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 ...

A team of astronomers has used asteroseismology, or the study of stellar oscillations, to accurately measure the distance of stars from the Earth. Their research examined thousands of stars and ...

Let’s try a demonstration that we all enjoyed in elementary school. Close one eye, hold out your thumb at arm’s length, and align it with an object on the other side of the room. Without moving your ...

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 ...

It’s a bit mind-bending to realise that everything we know about the scale of the universe comes from people stuck […] ...

Astronomers directly measured the distance to a region on the far side of our Milky Way Galaxy, past the Galaxy's center. Bill Saxton, NRAO/AUI/NSF; Robert Hurt, NASA Using a 180-year-old technique ...

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 ...

No, but it was considered. The reason parallax measurements weren’t taken with Voyager or any other interplanetary spacecraft is simply that astronomers can do better from the ground or with dedicated ...

Astronomers have for the first time precisely measured the distance to one of the oldest objects in the universe, a collection of stars born shortly after the big bang. Astronomers using NASA's Hubble ...