What are white holes?
Black holes are created when stars die catastrophically in a supernova. So what in the universe is a white hole?
Black holes are created when stars die catastrophically in a supernova. So what in the universe is a white hole?
Astronomy
Oct 9, 2015
38
908
In the northern sky in December is a beautiful cluster of stars known as the Pleiades, or the "seven sisters." Look carefully and you will probably count six stars. So why do we say there are seven of them?
Astronomy
Dec 22, 2020
30
20508
On Oct. 12, 2017, the asteroid 2012 TC4 is slated to whizz by Earth dangerously close. The exact distance of its closest approach is uncertain, as well as its size. Based on observations in October 2012 when the space rock ...
Space Exploration
Apr 13, 2015
8
4626
Gravity is a pretty awesome fundamental force. If it wasn't for the Earth's comfortable 1 g, which causes objects to fall towards the Earth at a speed of 9.8 m/s², we'd all float off into space. And without it, all us terrestrial ...
Space Exploration
Dec 7, 2016
3
10
There's something going on beneath the surface of Jupiter's icy moon Europa. But what?
Space Exploration
Sep 23, 2016
6
1710
The eight planets in our solar system each occupy their own orbits around the Sun. They orbit the star in ellipses, which means their distance to the sun varies depending on where they are in their orbits. When they get closest ...
Space Exploration
Apr 22, 2014
1
5
The Earth‐moon system's history remains mysterious. Scientists believe the system formed when a Mars‐sized body collided with the proto‐Earth. Earth ended up being the larger daughter of this collision and retained ...
Astronomy
Jun 22, 2020
11
3529
Grab your binoculars: A comet that has fascinated scientists for five years approaches its closest distance from Earth this week—and you might be able to catch a glimpse.
Astronomy
Jul 13, 2022
1
1012
The violent death throes of a nearby star so thoroughly disrupted its planetary system that the dead star left behind—known as a white dwarf—is sucking in debris from both the system's inner and outer reaches, UCLA astronomers ...
Astronomy
Jun 16, 2022
2
2950
The Earth is unique in our solar system: It is the only terrestrial planet with a large amount of water and a relatively large moon, which stabilizes the Earth's axis. Both were essential for Earth to develop life. Planetologists ...
Astronomy
May 21, 2019
16
4494