Stars appear to twinkle because the light from these distant objects passes through wobbly air in the atmosphere.
The five visible planets in the solar system are lined up against the predawn sky. Here's how to see them.
Earth's moon will join a rare 5-planet alignment in the predawn hours of June 23 to 25, for the first time in more than 150 years.
NASA aborted the 4th consecutive rehearsal launch of its powerful SLS rocket on Monday, citing a hydrogen leak.
New footage shows the mysterious auroral phenomenon called STEVE emerging from a blood-red arc of light in New Zealand in 2015.
A large star surrounded by a spiral-shaped disk of dust could be the result of an ancient near-miss collision at the Galactic Center.
Astronomers in Australia have detected the brightest and fastest-growing black hole to have existed in the last 9 billion years.
Astronomers have directly measured the mass and velocity of an isolated black hole for the first time using gravitational lensing.
A first-of-its-kind study into the inner workings of Jupiter has revealed that the gas giant fed on baby planets as it grew.
The signals were detected in narrow-band radio frequencies, which typically only come from artificial sources.
NASA's perseverance rover has a "pet rock" that has been stuck in its front-left wheel for four months.
NASA's next-generation space observatory has sustained its first noticeable impact less than six months after launch, but the agency isn't too concerned.