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terrestrial planets
27 November 2012, 01:10 PM ET
Mercury is the smallest planet, but it is very dense.
Mercury's Orbit Diagram
27 November 2012, 12:53 PM ET
Mercury is the sun's closest planet, but it has a bizarre orbit.
Sunlit Areas on Mercury’s South Pole
27 November 2012, 12:44 PM ET
Despite being closest to the sun, Mercury is not the hottest planet.
mercury
27 November 2012, 12:26 PM ET
The solar wind blasts the closest planet to the sun, leaving it with the thinnest atmosphere of all the planets.
Mercury's Pie Crust
27 November 2012, 12:14 PM ET
Mercury is a terrestrial planet with a rocky surface and metallic core.
Messenger Photo of Mercury
27 November 2012, 12:03 PM ET
The smallest planet collected material from the solar nebula.
galileo spacecraft
26 November 2012, 04:55 PM ET
Galileo was the first space probe to spend years observing the planet Jupiter and its moons
Dwarf planet Pluto is seen in an image taken by the Hubble Space Telescope.
20 November 2012, 01:29 PM ET
Pluto is two-thirds as big as Earth's moon.
This photo of Pluto (right) and its largest moon Charon is the best visible-light photo of the dwarf planet ever taken from Earth.
20 November 2012, 01:20 PM ET
The distance to Pluto changes because of the dwarf planet's odd orbit.
Hubble Space Telescope photo of Pluto is most detailed ever seen.
20 November 2012, 01:02 PM ET
Yes. Scientists think Pluto's atmosphere is mostly nitrogen.
Pluto's Atmosphere Warmer Than Thought
20 November 2012, 12:51 PM ET
Pluto is one of the coldest bodies in the solar system.
Dwarf planet Pluto was discovered in 1930 and was once considered to be the ninth planet from the sun in Earth’s solar system.
20 November 2012, 12:37 PM ET
The dwarf planet is composed of rocky material and a great deal of ice.
Kuiper Belt
20 November 2012, 12:31 PM ET
The dwarf planet formed a bit differently from the rest of the solar system.
venus surface
19 November 2012, 04:52 PM ET
To this day, the photos taken by the Soviet spacecraft are the best we have from the cloudy planet.
venus
16 November 2012, 06:41 PM ET
Venus is slightly smaller than Earth.
Perseid Meteor with the Moon, Venus and Jupiter
16 November 2012, 06:34 PM ET
Venus is the closest planet to Earth.
Chasing Clouds on Venus
16 November 2012, 06:23 PM ET
The atmosphere of Venus is thick with clouds of carbon dioxide.
Venus in the Ultraviolet and the Infrared
16 November 2012, 06:15 PM ET
Venus is the hottest planet in the solar system.
If you could look at Venus with radar eyes - this is what you might see. This computer reconstruction of the surface of Venus was created from data from the Magellan spacecraft.
16 November 2012, 06:05 PM ET
Venus, like Earth, is a rocky planet, but it has a smooth surface.
How Mercury, Venus, Earth, And Mars Formed
16 November 2012, 05:54 PM ET
Venus was made at the very beginning of the solar system after the solar nebula collapsed.
This image was taken during the 1999 Leonid meteor storm as part of NASA's Leonid Multi-Instrument Aircraft Campaign (Leonid MAC). The image was captured with a 28 mm camera.
16 November 2012, 02:00 AM ET
Watching a meteor shower on a clear, dark night is an unforgettable experience.
The Solar Heliospheric Observatory (SOHO) captured the coronal mass ejection (CME) from a huge solar flare on Jan. 23, 2012.
15 November 2012, 02:09 PM ET
The Solar and Heliospheric Observatory (SOHO) satellite keeps watch over sunspots and other solar events.
Saturn and three moons. Tethys. Dione and Rhea, seen by a Voyager spacecraft on August 4, 1982, from a distance of 13 million miles.
14 November 2012, 01:10 PM ET
Saturn is the second largest planet in the solar system.
In this photo by NASA's Cassini orbiter around Saturn, the planet Earth is visible as the small bright dot.
14 November 2012, 12:50 PM ET
Saturn is the farthest planet you can see with the naked eye.
Saturn's jet stream, captured by NASA's Cassini spacecraft.
14 November 2012, 12:44 PM ET
The gas giant is mostly atmosphere; it lacks a solid surface.
Saturn's northern storm marches through the planet's atmosphere in the top right of this false-color mosaic from NASA's Cassini spacecraft.
14 November 2012, 12:25 PM ET
Most of ringed planet's heat comes from within, rather than from the sun.
Saturn's Rings Seen by Cassini Probe
14 November 2012, 12:20 PM ET
The gas giant is mostly hydrogen and helium.
Artist's conception of our solar system's solar nebula, the cloud of gas and dust from which the planets formed.
14 November 2012, 12:12 PM ET
Saturn was made, along with the other planets, out of the cloud of dust and gas known as the solar nebula.
The Mariner 9 spacecraft.
12 November 2012, 12:41 PM ET
Mariner 9 changed our perceptions of the Red Planet.
mars global surveyor
08 November 2012, 04:55 PM ET
The mission rebooted NASA's exploration of the Red Planet, and launched a new strategy for building spacecraft.
solar system
07 November 2012, 06:24 PM ET
Jupiter is about 318 times as big as Earth.
A comparison of the visible, near infrared, and thermal infrared views of Jupiter. The thermal-infrared image shows the heat from the planet's surface, rather than the light reflected by the sun, and allows for greater understanding of the turmoil in the
07 November 2012, 06:10 PM ET
On Jupiter, temperature is dependent on the planet's interior, not the sun.
 
 
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