Astronomy & Space

How can the universe be 78 billion light years (or more) in size, when it is only roughly 13 billions yrs old

How is this possible?? OK... i guess the universe is expanding faster than the speed of light and really is 78 billion light years in size, but the farthest we could possibly see would be light from g

What Happens If Saturn Replaces Venus and Jupiter Replaces Mars

would anything happen to earth?-Then Saturn and Jupiter would most likely be like our next 2 big stars in the night sky and almost like 3 moons since Saturn and Jupiter are big and im sure it could ou

When is the last shuttle launch

just wondering what the schedule is for the last shuttle launch. thanks-Unless they have changed it in the last 3 days, its currently scheduled for Monday May 16, 2011. Sorry, youll have to check onli

Is it true there's more stars in the sky than grains of sand here on earth

i cant remember where i heard this but would be intresting to find out!-It is more than true, if you can imagine the infinite space of the universe packed with stars and a small planet (Earth) full of

If this is true then the universe could be infinitely old

so the known universe started with the big bang i accept that but that might not have been the start everyday black holes are made and they grow as they eat so what if before the big bang there was a

What Happens if Pluto crashes into Earth

just wondering?-we will all die what else.-Waste your time on other things. Find higher likelihoods for sudden death like your risk for heart attack, cancer, electrocution, etc. Find some insurance we

What would Happen if gravity Stops

what happens to the planets,etc?-Better yet, did you know that the AMOUNT of gravity differs on different parts of the Earth. Wrap your head around THAT. :)-On earth everythingwould fall off and float

What would cause a Planet to Explode

just wondering?-a supernova?-Arguably you could say that the Earth would explode if enough nuclear bombs were detonated at the same time. It wouldnt completely destroy the planet however.A desolate c

Earth is everything i think

Planets arent real. earth is everything. there is no such thing as outer space or planets or nothing. you cant escape earth because it is everything. do you not believe me? why arent there any videos

Is anyone else worried about 1950 DA

1950 DA is an asteroid which might hit earth on 2880 what do you think about it?-Then again, it might not. Why always concentrate on the negative side of things? It makes it look like you spend mor

Why cant i see the star RIGIL KENT anywhere in the night sky

Maybe it is not visible in nothern hemisphere ??? I live in greece.-Rigel Kentaurus is actually the 3rd brigtest star in the sky, but it is only visible in the southern hemisphere because it is close

What about 2012 that will be the end of our world

should we really be aware with mayas people ancient prediction?-I guess it’s up to you to really decide how much you want to read into it. One thing’s for sure; there’s allot of bullshit and conspirac

Why is the Sky Green IN Texas

What does this mean?Is this Tornado weather?-If its not the green flash at sunset, YES, it is tornado weather. The green flash last only a minute to three minutes or so at its longest. Im in central O

Question for amateur astronomers

Are you more in backyard astronomy (telescope, a few eyepieces, and just enjoying the stars) or the technical part of it (theories, physics, etc.)?-Im strictly a backyard astronomer. I got my fill of

Please explain how energy is generated in the core of a star during the second stage of its life cycle

astronomy homework and i cant find it in the book/internet anyway hahaha please help ! thanks!-i do think its because of the hydrogen gas and converting it into helium that causes it. Hydrogen is the