Light-years make measuring astronomical distances much more manageable. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. A light-year is a ...

If you want to find the size of a basketball, you can use a normal meter stick to measure the diameter. You should get a value of around 0.24 meters. Please don't use inches—they are just harder to ...

The Hubble Space Telescope has captured the best picture yet of a high-speed comet visiting our solar system from another star. A spectacular trio of merging galaxies in the constellation Boötes takes ...

But when the Sun, Earth, and Moon all align to produce a total eclipse, it teach us how far astronomical distances truly are. During a lunar eclipse, the Earth's shadow falls on the Moon; showing that ...

NASA's Hubble Space Telescope spotted a blazing heat from a bright, lonely spiral galaxy called UGC 9391. But even though it lacks a companion, it serves as a guiding light for every astronomer who is ...

Radio astronomers have directly measured the distance to a faraway galaxy, providing a valuable "yardstick" for calibrating large astronomical distances and demonstrating a vital method that could ...

Radio astronomers have directly measured the distance to a faraway galaxy, providing a valuable “yardstick” for calibrating large astronomical distances and demonstrating a vital method that could ...

“Space is big,” wrote Douglas Adams, and he wasn’t kidding. Familiar units of distance, like miles and kilometers, quickly become too unwieldy to use in cosmic discussions. After all, we don’t say the ...

Hi folks, tune in every week of 2023 for the best in astronomy from Astronomy Editor Dave Eicher, brought to you by Celestron. Dave’s weekly video series will cover all the latest sky events, ...

Astronomical distances are best measured by trigonometric parallax — using the annual shift in star position caused by Earth's motion around the Sun to derive distance. Now James Miller-Jones of the ...