Have you ever wondered how astronomers measure the distance to other objects in the universe? How do they make claims that this nebula is 1,500 light years distance or that galaxy is 2.5 million light ...

Ask any elementary schooler reared on YouTube and they will tell you that the edge of the observable universe is 46.5 billion light years away. But have you ever wondered how we know this? Come to ...

How is astronomical distance determined? Just cannot get my head around cepheid variables, parallax, etc. How is it possible to tell how far away something is when you cannot bounce a radar beam off ...

A wide open space (It could be your backyard or a park.) Two Hula-Hoops (Alternatively, you could use two flat rocks or bricks that you can sit on.) A yardstick or meterstick (Use one that has clear ...

For most of us, the countless bright spots in the nighttime sky all seem to be stars. But in fact, some of those spots are actually planets, or distant suns, or even entire galaxies located billions ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The parsec is one of the most commonly used distance measurements in astronomy — even more so ...

Extra stellar systems are so far away from our own that we couldn’t even hope of developing a tape measure long enough to determine how far away they really are. On the other hand, astronomers can ...

A new method of measuring the distances between stars enables astronomers to climb the 'cosmic ladder' and understand the processes at work in the outer reaches of the galaxy. Astronomers from the ...

Now that gravitational waves have been discovered, it is time to put them to use. The Universe is big, and getting bigger all the time. A little-known fact about gravitational waves, the latest ...