Space
The universe beyond Earth — from our solar system to the edge of the cosmos.
Space Stars & Galaxies
Betelgeuse is so big that if it replaced the Sun it would swallow the planets out to Jupiter
Space Stars & Galaxies
The Milky Way is on course to collide with the Andromeda galaxy in about 4 billion years
Space Stars & Galaxies
Red dwarfs are the most common stars in the Milky Way, about three-quarters of them
Space Stars & Galaxies
The Sun's core is about 15 million degrees Celsius, hot enough to fuse hydrogen into helium
◆ On this day
On this day in Space
21 Jul 1969
2 Jan 1959
7 Jan 1610
14 Jan 2005
16 Jan 1969
31 Jan 1958
Space Space Exploration
Explorer 1 becomes the first U.S. satellite and discovers the Van Allen belts
3 Feb 1966
6 Feb 1971
8 Feb 1969
15 Feb 1564
18 Feb 1930
18 Feb 1977
