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The isolated mountains in the midst of the smooth nitrogen plains are probably also made of water ice, which is very hard at the temperatures on Pluto and can float on frozen nitrogen. Additional mountains, and some hilly terrain that reminded the mission scientists of snakeskin, are visible in part (b) of [link] . These are preliminary interpretations from just the first data coming back from New Horizons in 2015 and early 2016. As time goes on, scientists will have a better understanding of the unique geology of Pluto .

Diversity of terrains on pluto.

Image A shows the surface of Pluto, with cratered highlands at the bottom and hills at the top. Image B shows another area of the surface on Pluto, with rounded mountains.
(a) In this photo, about 250 kilometers across, we can see many different kinds of terrain. At the bottom are older, cratered highlands; a V-shaped region of hills without cratering points toward the bottom of the image. Surrounding the V-shaped dark region is the smooth, brighter frozen nitrogen plain, acting as glaciers on Earth do. Some isolated mountains, made of frozen water ice, are floating in the nitrogen near the top of the picture. (b) This scene is about 390 kilometers across. The rounded mountains, quite different from those we know on Earth, are named Tartarus Dorsa. The patterns, made of repeating ridges with the more reddish terrain between them, are not yet understood. (credit a, b: modification of work by NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute)

A quick look at charon

To add to the mysteries of Pluto, we show in [link] one of the best New Horizons images of Pluto’s large moon Charon . Recall from earlier that Charon is roughly half Pluto’s size (its diameter is about the size of Texas). Charon keeps the same side toward Pluto, just as our Moon keeps the same side toward Earth. What is unique about the Pluto-Charon system, however, is that Pluto also keeps its same face toward Charon. Like two dancers embracing, these two constantly face each other as they spin across the celestial dance floor. Astronomers call this a double tidal lock.

Pluto’s large moon charon.

Image A is of Charon, showing the polar cap at the top. Image B is of Charon from a different angle, with an inset highlighting a depression in the surface which appears to contain a mountain.
(a) In this New Horizons image, the color has been enhanced to bring out the color of the moon’s strange red polar cap. Charon has a diameter of 1214 kilometers, and the resolution of this image is 3 kilometers. (b) Here we see the moon from a slightly different angle, in true color. The inset shows an area about 390 kilometers from top to bottom. Near the top left is an intriguing feature—what appears to be a mountain in the middle of a depression or moat. (credit a, b: modification of work by NASA/JHUAPL/SwRI)

What New Horizons showed was another complex world. There are scattered craters in the lower part of the image, but much of the rest of the surface appears smooth. Crossing the center of the image is a belt of rough terrain, including what appear to be tectonic valleys, as if some forces had tried to split Charon apart. Topping off this strange image is a distinctly red polar cap, of unknown composition. Many features on Charon are not yet understood, including what appears to be a mountain in the midst of a low-elevation region.

Key concepts and summary

Pluto and Charon have been revealed by the New Horizons spacecraft to be two of the most fascinating objects in the outer solar system. Pluto is small (a dwarf planet) but also surprisingly active, with contrasting areas of dark cratered terrain, light-colored basins of nitrogen ice, and mountains of frozen water that may be floating in the nitrogen ice. Even Pluto’s largest moon Charon shows evidence of geological activity. Both Pluto and Charon turn out to be far more dynamic and interesting than could have been imagined before the New Horizons mission.

Questions & Answers

Let's Talk about Time travel and paradoxes?
Joker Reply
tell which paradox
vijay
What kind of paradox there are so many of them
Tanmay
twin paradox?
vijay
oh yes please I don't know anything about it
Tanmay
EPR
Joker
Tanmay what you don't know?
vijay
anything about it
Tanmay
twin paradox?
vijay
Nothing. he know everything 🙃
Joker
I heard it from my friend yesterday but I forgot to look it up
Tanmay
well it tells about time travel
vijay
I don't know anything about twin paradox he said that this paradox is really cool and I should look it up
Tanmay
oh ok
Tanmay
so what is the paradox thing in it
Tanmay
vijay tell. about twin paradox?
Joker
there are twin brothers and one of them goes for a round trip of a star ,say alpha centuari
vijay
and the space craft can travel at speed of light
vijay
and the paradox is about something related to the age difference that happens to both brothers
vijay
and than
Joker
now I can't recall whole paradox
vijay
ok. I gonna read it
Joker
I have an article, I will read it and tell you afterwards
vijay
which is the more coolest paradox? mine Bootstrap
Joker
So the twin who went to space would be younger than the other one and since they were twins they should be of same age. and this is a paradox. oh got it thanks
Tanmay
@joker did you get your innermost stable orbit answer?
Tanmay
no bro. I don't understand. Before you I never heard about innermost orbit in black hole
Joker
I think the coolest one is bootstrap paradox and banarch tarski paradox
Tanmay
ok you know that orbit is an imaginary line drawn in spacetime which tells us that an object will trace this path with respect to this center
Tanmay
So the innermost stable orbit of a black hole is an orbit in which only the particles with the speed of light can revolve around that black hole with respect to its center
Tanmay
Nothing can revolve around the black hole inside the innermost stable orbit as it will need a velocity greater than speed of light to successfully complete its orbit otherwise it will end up inside the black hole
Tanmay
Got it?
Tanmay
yeah
Joker
I don't know much about these think bt I want learn? ty
Joker
you also asked about parallel universes. a parallel universe is a similar looking universe but in that universe you take other choice rather than your choice done in this world
Tanmay
hello
Pratiksha
For example there are 2 choices A and B in this universe you choose A but in a parallel universe you choose B
Tanmay
If you and parallel you meet each other then there is no way for anyone to find any difference between you two
Tanmay
Like electrons
Joker
Can you explain a little more What do you mean?
Tanmay
You say nothing difference. just like all electron charge same, mass same
Joker
electrons are different from each other if we talk about an atom but they might be completely same if we talk about bunch of atoms correct me if I am wrong I don't know Quantum mechanics
Tanmay
Do you know about .The one electron universe theory
Joker
But in the parallel universe you physically are same (in some universes you will be completely different) but your choices are different
Tanmay
Simply in all the universes there will be something different in each one of them. In one of it you might be made up of antimatter only or dark matter or exotic matter or you might not even exist
Tanmay
yeah . it might be
Joker
got it?
Tanmay
yeah
Joker
but which theory tells about these things. we made up of anti matter in parallel universe Or it's you thought?
Joker
There is a theory about parallel universe which says that it is similar to our universe but it is not exactly copy of our universe. I expanded it to include your choices and different types of matter and energy
Tanmay
from where you read these things
vijay
can you suggest me some books or reading material
vijay
from where you read these things
vijay
Wikipedia, hyperphysics, YouTube and other random sites my friends also tell me a lot about these
Tanmay
your friends are good
vijay
where can I find hyperphysics
vijay
***hyperphysics.phy-astr.gsu.edu/hbase/hframe.html
Tanmay
do you need the names of YouTube channels they are really reliable and have good degree
Tanmay
yes
vijay
yeah tell
Joker
and thx
vijay
for good animation and science ( including biology) check science in a nutshell
Tanmay
for physics check Arvin Ash, PBS space time, Fermi Lab. they have highest degree and can explain stuff really easily including maths in physics
Tanmay
For cool physics experiments and their reasoning behind it check Veritasium, Vsause(also does videos on paradox and maths), there are other channels like Vsause 1, Vsause 2 etc they make videos on daily life paradox, maths and physics
Tanmay
All of them are reliable and if something is wrong or they explained it wrong then they edit the videos and tell us about it
Tanmay
for short physics videos check minutephysics they explain stuff really good in those 2-3 minutes
Tanmay
you should start by watching science in a nutshell as they have limited no of astrophysics videos and don't go deep
Tanmay
thanks a lot
vijay
from early morning the conversations had started, now also texting🤦‍♀️🤷‍♀️
Pratiksha
welcome
Tanmay
JSTF up Tanmay... if u don't know anything about it..then please don't misguide and spread misinformation
Stardust
What do you mean stardust
Tanmay
Where was I wrong?
Tanmay
I heard about time travel in hindu veds n story as well
Ankita
yeah. there is lot's of knowledge about Universe, time travel, medical science, atoms in our veds
Joker
so is there is any organization who is actually searching the real science behind it
Ankita
Stardust you still didn't tell me where I was wrong
Tanmay
how come you talk about time travel and paradoxes if you don't know one of the most basic theory like twin paradox. Just to correct you, i meant misinformation and not wrong information bruhh. if you want to, start with astrophysics for dummies by Neil degrasse Tyson.
Stardust
I know a lot about astrophysics but I actually never heard twin paradox because I tend to avoid reading paradoxes
Tanmay
who is stardust
vijay
stardust what level of student you are?
vijay
the one who wrote just before my previous comment
Tanmay
Some serious conversation is going on haa
Mahesh
I find it hard to believe Tanmay has never heard of the Twin Paradox (admittedly I haven't read the whole thread but they've posted on a lot with a lot of valuable thought). Also, cut the attitude Stardust, you're clearly not a mature academic because if you were you wouldn't have that attitude.
ben
Tanmay, you defo need to check out the Twin Paradox, you would love it, it's a real mind tease. Regardless, we dont use that attitude Stardust, this is why some people hate academics, because of that arrogant attitude, treat each other with respect here and we may actually learn from each other.
ben
Come on not knowing twin paradox is not an issue. If you don't know just learn it because in the end only it matters.
Mahesh
Well he was not mean he just misunderstood me nothing is serious
Tanmay
ok I will check it out
Tanmay
His comment tells us that he takes misguide information or spreader very seriously
Tanmay
Don't care what others think?You are not born to please them.
Mahesh
hey when we will keep learning more things we will also get paradoxes but we can't quarrel we can just solve issues by sharing knowledge and discussion
vijay
At the end I got to know that this paradox is really important and cool I should know it
Tanmay
yes that's why there is this feature
Tanmay
It is cool but not important as I feel it,because it is about frames and theory of relativity.For example did you watch interstellar
Mahesh
might be we can start discussion on twin paradox once we learn it properly
vijay
what do you think we should keep a discussion on holiday
vijay
Select some topics which topic gets more votes we will discuss that.
Mahesh
I watched interstellar
Tanmay
yeah a discussion on Sunday or Saturday will be great
Tanmay
I also want to watch interstellar
vijay
the movie is in my PC and I need to schedule out some time for it
vijay
More about black holes ( every one come here to discuss more about it)
Tanmay Reply
Not totally...
Mahesh
Dark planet?
Joker
hey, when the old stars get blast and sometimes they get collected at one place, and the black hole is formed
Pratiksha
hello
vijay
I'm I right..?
Pratiksha
hi
Pratiksha
you are not accurate
vijay
Actually when a star of mass 8 times greater than that of our sun then it becomes a stellar mass black hole
Tanmay
Yeah,it was called as nebula aa long time back because at that time the astronomers thought that it is a patch of light with glowing of gases or aa new solar system is forming...
Mahesh
I'm still studying in school, and I love about space
Pratiksha
tanmay it's 8 or 3
Joker
Yeah and the upper one is called chandrasekhar limit
Mahesh
you should read the content in this app daily it will help a lot
Tanmay
ok
vijay
Yeah exact is 1.4
Mahesh
Not 8
Mahesh
actually I have not started reading this app yet
vijay
3 right
Joker
no 1.4
Mahesh
ok
Pratiksha
hey if we talk about a person observing another person falling in black hole we will see him stop by event horizon but he would be falling in black holes
vijay
yes
Tanmay
IDK. but I see in lots of video. when star 3 times larger than our sun. when it's explode it's forming a black hole
Joker
1.4 solar mass looks really small for a black hole
Tanmay
every big star don't get converted to black hole
vijay
a red giant gets converted to a neutron star
vijay
yeah, that's true!!
Pratiksha
there are best chances to form black hole is when two neutron stars collide
vijay
and with the collision gamma Ray Burst happens
vijay
After a supernova if a stars core is more than 3 time the mass of sun then it becomes a black hole
Muhtasim
Plz Tell me. If Betelgeuse explode. which is 700 time larger than our sun. when it explode it's forming a black hole?
Joker
I don't understand properly about quasars can anyone explain me
vijay
yes there are there is best chance for Betelgeuse
vijay
Guys Chandrasekhar limit is 1.4 solar masses it tells us that a white dwarf will convert into neutron star if it's mass is greater than 1.4 solar mass
Tanmay
but you know turning into a black hole don't depend on size it depends on mass of a star
vijay
we need a star of mass 8 Solar masses or higher to make a black hole
Tanmay
I am also talking about mass
Tanmay
solar mass
Tanmay
what about Betelgeuse
vijay
Quasars are high mass Black holes accreting materials, some emit radio emissions while others emit only optical light
Kabita
less than 1.4 solar mass star becomes a white dwarf more than 1.4 less than 8 becomes neutron star more than 8 becomes a black hole
Tanmay
@Joker It doesn't matter if a star is 700 times larger than our sun.if the star has a mass of more then 8 times the mass of sun then it will become a black hole..
Muhtasim
Quasars are the most energetic and distant galactic nuclei known
Kabita
@joker innermost orbit of a black hole is the orbit where only particles with the speed of light only can revolve around the black hole
Tanmay
orbit is an imaginary line drawn on the space-time fabric which tells us that this is the path that an object make taking any other object as a center
Tanmay
is anyone privileged to have a watch of perseids meteor shower this month
vijay Reply
Sadly I was not privileged enough
Tanmay
tomorrow they are at peek so don't miss them
vijay
I am also not lucky due to clouds
vijay
ok thanks for the information
Tanmay
the major problem is clouds
vijay
but we can't deny them also because it is lifeline of humans
vijay
may you get a view of perseids tomorrow very very Early morning
vijay
black hole formation
Karanveer Reply
A black hole is formed when any matter is compressed to have a radius less than the Swartzchild radius
Tanmay
Swartzchild radius = 2GM/c² where M is mass c is speed of light and G is universal gravitational constant
Tanmay
tnccc
Karanveer
A stellar mass black hole can be made by a star of mass 8 times that of sun
Tanmay
What is the end of our Universe. Except Big crunch? Does any theory Exist who tell about Ending Universe?
Joker
In the equation above it's 2GM/c^2
Tanmay
Yes there are 3 types in which our universe will end
Tanmay
what is ?
Joker
1st big crunch in which our universe keeps expanding at eventually all matter is converted into protons neutrons and electrons
Tanmay
then 2nd in which our universe stops expanding and gravity takes over and we get another big bang
Tanmay
expainding universe cooling
Karanveer
3rd in which there is a delicate balance between gravity and expansion of our universe then slowly every matter will decay to give dark dull universe
Tanmay
ty
Joker
Swartzchild means?
Darshan
It's a name of a scientist
Tanmay
This formula is used to tell the size of black hole fron center to event horizon
Tanmay
nice sir
Darshan
can you tell me that, does multiverse and superverse really exist?
Darshan
yes. MULTIVERSE and Superverse exist
Joker
Multiverse is collection of all the universes or it might also be collection of all the parallel universes they are both theories and right now we can't prove it right or wrong
Tanmay
Superverse is the collection of all the multiverses since we can't prove that multiverse exist or not so no one ever went into this discussion
Tanmay
Infinite Universe in InfiniteVERSE
Joker
Yes universe might also be infinitely large so multiverse might not exist
Tanmay
why not Multiverse Exist.. There are Some hypothetical theory Who tells about Multiverse. it might be exist
Joker
I am also saying that this is a theory it might exist
Tanmay
look theory is theory
vijay
but if we are able to crack the coded Indian cosmology we will definitely get many answers
vijay
say if multiverse exists then how would it look like
vijay
it would be like star clusters like our local group but instead of galaxies it will have universes
Tanmay
Most of the information is lost in Indian cosmology so we need to develop them again
Tanmay
The multiverse might also be completely dark because light might not be able to escape a universe and reach other universe
Tanmay
But there can be some cosmological passages from which the universes will be connected from each other just like as some hypothetical theories say that black hole is a type of shortcut bridge to travel in different sides of space time curve
Kabita
hey we can't talk in air we need some quantised reasons or principles
vijay
and wormholes
Joker
worm hole needs a concrete theory
vijay
worm hole🤔
vijay
I don't know much about it, I need read reading
vijay
I am still confused about dark matter
vijay
I suspect if dark matter really exists
vijay
Well don't worry they exists in quantum fields.
Mahesh
quantum fields mean fields of very small level where mass is negligeble
vijay
and if dark matter is present in quantum fields it means they exist even in any field macroscopic or quantum level or microscopic level
vijay
Read Quantum field theory. It's Not telling about dark matter. telling about matter. So We can say there is ( dark matter) some forces and fermions type things are present....
Joker
well I can't tell much
vijay
I need a lot of reading
vijay
now I am in 11th STD so I need to manage time for reading
vijay
I am in 12 but I have many questions about this
Shruti
but much less time
Shruti
why Andromeda galaxy is also called Andromeda nebula
Shruti
IDK. But The answer is before discovering this Galaxy. scientist think it's nebula.
Joker
yes
Tushar
the black hole is also formed at the death of a star
americantuber
There are multiple different Andromeda galaxies.
Micheal
multiple different Andromeda galaxies?
vijay
I am much interested in gamma Ray Bursts. the evil bursts which release much much much energy.
vijay
Quantum fields tell us about formation of matter and antimatter and about worm holes. It does not tell us about dark matter
Tanmay
yes
vijay
quantum physics is directly related to the matter present but it doesn't tell about dark matter
vijay
The hypothetical black hole that is shortcut bridge to travel to different types of space-time was theorised but then scientist said that the space-time fabric cuts itself to give black hole at the end
Tanmay
Yes dark matter was discovered by studying the rotation of the galaxies
Tanmay
Earth gravity is 1G . thus it's attract us 9 m/s. A Neutron start gravity is Near about 7 billion G . So it attract us 7000000000×9m/s . The question is it's faster than Light?
Joker
you are mixing acceleration with velocity
Tanmay
acceleration can be infinite but velocity has to be at max of c
Tanmay
The physics you read at school is at super low velocity and it's Newtonian mechanics near the speed of light you need to study classical mechanics
Tanmay
Is acceleration and velocity is proportional
Joker
no matter how much the acceleration is it need more and more time for that acceleration to reach you at the speed of light
Tanmay
tell me. if we going near the black hole. so it can attract us speed of light?
Joker
no not at all acceleration can be positive but then our velocity might retard if we go anti parallel to the acceleration and it might also increase if we go parallel to acceleration
Tanmay
near the black hole we will get a velocity near the speed of light but inside the event horizon we get velocity of faster than the speed of light
Tanmay
inside the event horizon our physics breaks down that's why anything is possible inside the event horizon
Tanmay
oh I understand. ty
Joker
The innermost stable orbit of a black hole is an orbit where light orbits it and doesn't end up inside the black hole
Tanmay
welcome
Tanmay
tanmay one question. are you user or creator of this application
Joker
What about shruti question . why Andromeda nebula called Andromeda galaxy
Joker
Where is the end INNERORBIT of black hole? and where the all is thing going?
Joker
parallel world?
Joker
I am user of this application
Tanmay
I never heard anyone calling Andromeda galaxy a nebula
Tanmay
You know what orbit means?
Tanmay
events horizon
Joker
no I am talking about just orbit like earth orbits our sun
Tanmay
earth revolves around the sun in its orbit
Tanmay
Actually according to special theory of relativity if you are attracted or fallen in a black hole you will be not seen falling into it because of time dilatation
Mahesh
hi
Pratiksha
hko
Karanveer
I am talking with respect to the person falling in the black hole you are talking with respect to the people seeing him outside the black hole
Tanmay
I think you are really annoyed because of constant messages comming due to this discussion
Tanmay
in your question
Tanmay
hey, what u all are talking about ..?
Pratiksha
we are kind of discussing every thing about black holes
Tanmay
Read all the chats from beginning
Mahesh
Have you ever heard of someone saying Andromeda galaxy as Andromeda nebula
Tanmay
No
Mahesh
Shruti asked about it I am really confused
Tanmay
By the way I am a 12th completed student
Mahesh
Did you completed too?
Mahesh
no I am in 12th
Tanmay
the old stars get blast and are sometimes collected in one place, and then the black hole is formed. I'm I right..?
Pratiksha
can, any one tell me..? that I'm I right or wrong?
Pratiksha
what happened if moon replace Jupiter
Naresh Reply
we well never exist because Jupiter's mass and gravity is toooo high so it will protect us from asteroids comments etc... but moon can not do that.
Yabtsega
that's accurate
Joel
What is the definition of spacial relativity
Yabtsega Reply
what is a black hole
Jesse Reply
why do people use eclipses
Jesse
black hole is very massive object which is made up of explosion of huge dead stare
Yabtsega
a supernova
Joel
it's actually an implosion
Joel
it's actually an implosion
Joel
it's actually an implosion
Joel
it's actually an implosion.
Joel
yep It is the explosion
Yabtsega
thanks for correction
Yabtsega
my pleasure
Joel
but It It depend on the supernova It either explode or implode .
Yabtsega
Exactly if it implodes is formed a black hole due to the massive gravity but if the supernova explodes is formed a neutron star.
Joel
if a star at its white dwarf stage has mass equal to 1.4 times the mass of our sun then it has a highly chance of a becoming a black hole
Mahesh
It is known as chandrasekhar limit
Mahesh
Right
Joel
when two Neutron Stars merge , they can also make black hole
Gurjinder
Has the start of another big bang started to happen yet?
LAURA Reply
are there any home learning courses linked to jobs and carriers in space?
LAURA
i dont know for sure but as yourself i am also very interested on it
Paco
we will never know this as big bang creates universe so it might be happening right now outside of our universe and we don't have any technology to do anything outside our universe.
Tanmay
In India how I can become an astrophysicist? Can anyone tell me the institutes and the procedure?
Brett
it Is the theory of "stringhe";i suppose now!
Michele
it Is very difficult and is a new theory that explain universe in another way!
Michele
does tidally locked planet have magnetic field?
SCIENCE Reply
no its bc it doesn't rotate at all so it doesn't create friction in its interior and that in turn doesn't create no magnetic field
NARUTO
There is no way for us to find it out because their cores might revolve although their crust is not rotating
Tanmay
what is mean by dwarf planet
Mohamed Reply
Nearly round shaped planet, bil smaller compared with other planets
Murrino
thank you murrino I was thinking another type of planet but now i remember
NARUTO
These dwarf planets are nearly like Mercury but these planets have not cleared every matter present in their orbital path. Like most of the dwarf planets are present at asteroid belt as their neighborhood is not cleared of matter
Tanmay
But since Mercury was capable to clear its path so it is called a planet rather than a dwarf planet
Tanmay
Of course they should directly orbit our Sun rather than any other planet
Tanmay
this on our solar system
Youssef
not necessarily
Tanmay
The mass of a planet is twice the mass of the Earth and the radius is half of the Earth. If an object is placed in the equatorial region of the planet, it cannot be held by the gravitational force; Any other area can hold. How long is a day on the planet? (Earth's redius is 6370 km)
Muhtasim Reply
what is energy made up of?
Suman Reply
It is a fundamental property that exists, it is not made of anything
Tanishk
what is the correct arrangement of the horoscope
edwin Reply
what causes voids in space like bootes void?
NARUTO Reply
I think that it has somehow managed to get a lot of dark energy which makes star formation hard
Tanmay
Or this area might have a lot of gas clouds which obstruct our view of its star. that means it has normal amount of galaxies but we can't see them
Tanmay
but why scientists are saying that it bounces galaxues away while containing some inside it 🤔🤔🤔
NARUTO
I never heard anyone say that
Tanmay
well a YouTube channel called the seeker just said that scientist doing observations on this phenomenon is causing galaxies to bounce of
NARUTO
hi
Bas_
can you send the link to that video I didn't got any video saying galaxies to bounce
Tanmay
***youtu.be/I4Yc8Zw_NJo
NARUTO
there
NARUTO
ok I will see
Tanmay
I might get the wrong idea but that's what I understood
NARUTO
ok
Tanmay
who knows how to get dark materia
Jordan
its literally next to impossible, even the best scientist are only able to get 5 nanograms of it
NARUTO
I think we can get it from dark hole
Jordan
yeah but getting a black is nearly impossible at this moment
NARUTO
yeah I know but they can just think
Jordan
what are you talking about
Tanmay
What black?
Tanmay
black hole*
NARUTO
So who managed to make 5 nanograms of black hole?
Tanmay
What does that even mean 5nm of black hole
Tanmay
It's Swartzchild radius might be below plank length
Tanmay
I meant 5 nanometers of dark energy
NARUTO
oh ok I got it
Tanmay
we live in a place which only has 3 dimensions and our imaginations are only limited till there neither is the space infinity nor are our imaginations!
Samuel Reply
hi guys can we all discuss about a thought which I have?
Samuel
yes why not tell us
Tanmay
I do not know
Clint
it's up to u to do your homework
Clint
we live in many dimensions, x,y,z, time, gravity, light, ...... an n num of Dem,
Clint
Is this the question? we live in a place which only has 3 dimensions and our imaginations are only limited till there neither is the space infinity nor are our imaginations!
Tanmay
ppl thought we lived on a flat earth, 2 Dem, them 3, then 4 Einstein, ...... the list goes on
Clint
ur turn to work
Clint
work
Clint
young buzzards chew at the various of the old, find new food
Clint
work, there is no free ride in learning
Clint
read everything, process it later, keep reading
Clint
one day, you will make a contribution to science, but u have to read, u have to take ur bumps
Clint
I think we should read and understand what it wants to tell us what you learnt where can it be used and than go forward
Tanmay

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Source:  OpenStax, Astronomy. OpenStax CNX. Apr 12, 2017 Download for free at http://cnx.org/content/col11992/1.13
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