30 October 2013, 01:36 AM ET
The Quadrantids are a meteor shower in January that peak for only about six hours, are named for a constellation that no longer exists and come from an asteroid rather than a comet.
28 October 2013, 04:25 PM ET
The Eta Aquarids are a meteor shower best visible from the Southern Hemisphere.
23 October 2013, 06:47 PM ET
The Lyrid meteor shower has been observed for more than 2,700 years.
22 October 2013, 04:56 PM ET
The Leonids take place every year in November. Once a generation, it is possible for a storm of meteors to occur with a peak of about 1,000 an hour – or even more.
21 October 2013, 04:05 AM ET
The Orionid meteor shower, made up of remnants of Halley's Comet, peaks in mid-October.
16 October 2013, 05:54 PM ET
The rings of Saturn are made of billions of particles, from tiny grains to giant chunks.
08 October 2013, 07:29 PM ET
Makemake was the fourth dwarf planet named. It was one of the bodies that caused Pluto to lose its status as a planet.
04 October 2013, 08:44 PM ET
Haumea, the fifth body in the solar system to be classified as a dwarf planet, spins faster than any other known large body in the solar system.
03 October 2013, 03:58 PM ET
The Perseids meteor shower arises out of the debris of Comet Swift-Tuttle, which last made a pass by Earth in 1992.
01 October 2013, 06:35 PM ET
Acrux is made up of three stars, and a possible fourth that lies close by.
30 September 2013, 09:07 PM ET
Weightlessness, or the absence of gravity, has several short-term and long-term effects on astronauts.
27 September 2013, 05:09 PM ET
Adhara is a bright binary star in Canis Major that shows up best in ultraviolet light.
27 September 2013, 01:39 AM ET
Hadar is a binary-star system in the Southern Hemisphere. Its stars may go supernova in the future.
26 September 2013, 05:04 PM ET
Mars has water trapped in the polar ice caps. More water may lie just beneath the surface.
26 September 2013, 01:04 AM ET
Fomalhaut has a planet that rose from the dead, as well as a vast number of comets that crash into each other daily.
24 September 2013, 05:03 PM ET
Procyon is a binary system, with a main-sequence larger star and a smaller white dwarf star orbiting each other.
23 September 2013, 08:24 PM ET
Deneb, one of the three stars of the Summer Triangle, anchors the tail of Cygnus the Swan.
20 September 2013, 09:29 PM ET
Regulus is a bright star in the northern sky that has at least two known stellar companions.
19 September 2013, 06:16 PM ET
Rigel is the brightest star in Orion, and will eventually explode into a supernova, most astronomers say.
18 September 2013, 07:39 PM ET
Canopus is the second-brightest star in the night sky despite its distance from Earth.
17 September 2013, 10:36 PM ET
Arcturus is a red giant that is one of the brightest stars in Earth's night sky.
12 September 2013, 04:01 PM ET
Voyager 1 is farther away than any other spacecraft from Earth.
10 September 2013, 08:22 PM ET
The China National Space Administration coordinates space activities in the country. It has launched several people into space and deployed a small space station, called Tiangong-1.
09 September 2013, 08:10 PM ET
Roscosmos, formed in 1992, came after decades of Soviet experience in space. Roscosmos is a large contributor to the International Space Station.
05 September 2013, 09:14 PM ET
The Japanese Aerospace Exploration Agency does robotic missions, human spaceflight and also technology demonstrations. It also is a big contributor to the International Space Station.
27 August 2013, 11:59 PM ET
The European Space Agency coordinates space activities among 20 member states.
26 August 2013, 06:43 PM ET
Some scientists think the sun is part of a binary system and that it has a companion star that affects life on Earth.
26 August 2013, 04:59 PM ET
The Canadian Space Agency is famous for its astronaut program and robotics technology.
25 August 2013, 05:28 AM ET
A brief biography of the naval aviator, test pilot, astronaut.
23 August 2013, 06:17 PM ET
Binary stars are two stars orbiting a common center of mass.
21 August 2013, 06:00 PM ET
A red giant star is a dying star in the last stages of stellar evolution. Our own sun will turn into a red giant star, expand and engulf the inner planets, possibly even Earth.
19 August 2013, 11:25 PM ET
Most of the stars in the universe are main sequence stars. The sun is a main sequence star.