Buradaki / Shutterstock
Textbooks often show Earth’s orbit around the Sun as an almost egg-shaped ellipse. The real story is very different.
Penumbral lunar eclipses slightly darken the Moon.
H. Raab/Wikipedia Commons
Not all lunar eclipses are alike. An astronomer explains the science behind the slight dimming of the Moon on May 5, 2023.
Some stars travel at high speeds through the universe and sometimes leave spectacular clouds of dust and gas in their wake.
NASA, ESA and R. Sahai (NASA's Jet Propulsion Laboratory)
Hypervelocity stars were discovered only 15 years ago and are the closest things in existence to real shooting stars. They travel at millions of miles per hour, so fast that they can escape from galaxies.
Unmanned rocket explodes moments after launch.
NASA/Joel Kowsky
Cheap, affordable space travel would be revolutionary. Chances are, when it comes, it won’t rely on the brute force approach of rockets.