cosmic microwave background radiation

When Was the First Light in the Universe?

When was the first time that the Universe cooled down enough that light could finally move around?

6 years ago

How Many Galaxies Are There in the Universe?

Did you hear that the Universe has 10x the number of galaxies? How did astronomers discover this, and what does…

6 years ago

How Are Galaxies Moving Away Faster Than Light?

So, how can galaxies be traveling faster than the speed of light when nothing can travel faster than light? I’m…

7 years ago

What Shape is the Universe?

It's a reasonable question to wonder what the shape of the Universe is. Is it a sphere? A torus? Is…

8 years ago

Weekly Space Hangout – April 24, 2015: Bas Lansdorp, CEO of Mars One

Host: Fraser Cain (@fcain) Special Guest: Bas Lansdorp, CEO of Mars One Guests: Morgan Rehnberg ( / @MorganRehnberg ) Brian…

8 years ago

Is the Universe Finite or Infinite?

Two possiblities exist: either the Universe is finite and has a size, or it's infinite and goes on forever. Both…

8 years ago

How Far Back Are We Looking in Time?

When we look out into space, we're also looking back into time. Just how far back can we see? The…

8 years ago

What Will We Never See?

Thanks to our powerful telescopes, there are so many places in the Universe we can see. But there are places…

8 years ago

How Do We Know How Old Everything Is?

We hear that rocks are a certain age, and stars are another age. And the Universe itself is 13.7 billion…

8 years ago

Why Can’t We See the Big Bang?

Since telescopes let us look back in time, shouldn't we be able to see all the way back to the…

8 years ago