The universe is big, so the news is delayed by the vast gulfs of space it has to cross ... reach it and roughly the same time to return to Earth. By the time the light reaches us, it has spread ...

Even small asteroids can do a lot of damage—and new research shows the James Webb Space Telescope is adept at spotting the ...

A light-year is the distance light can travel in one Earth-year. One light-year is about 5.88 trillion ... When discussing ...

Things have been tumultuous lately on Earth. Donald Trump will soon be sworn in as U.S. president, wars are raging, and ...

Light is a time machine: all we see, from stars to galaxies, shows the past. Expanding space stretches light, letting ...

Year? A light-year is the distance light travels in one year. Light moves incredibly fast — about 186,000 miles (300,000 ...

Why is space so dark despite all of the stars in the universe? The question of why space is dark, even though it is filled ...

Doubly unfortunate for those among us eager to visit galaxies far, far away–even moving at near lightspeed isn’t in the cards. “It’s neither possible nor survivable to travel near the speed of light ...

An extreme heating event may have interfered with scientists’ attempts to figure out the Moon’s age by dating lunar rock ...

Although the space agency has confirmed no imminent danger, the close encounters highlight the importance of vigilant ...

"How and where particles are accelerated in the jets of supermassive black holes has been a long-standing mystery." ...

Enlightened people see themselves and all humans as fellow citizens of one world – travelling on the same planet spinning ...