20 January 2015, 03:53 PM ET
When astrobiologists contemplate life on nearby planets or moons, they often suggest such life would be simple. Instead of there being some kind of multicellular organism on, say, Jupiter's moon Europa, scientists instead aim to find something more like a
15 January 2015, 07:41 PM ET
The NASA probe launched in January 2005 and will encounter Pluto in the summer of 2015.
13 January 2015, 07:30 AM ET
Researchers were able to pinpoint the Saturn system's center of mass, or barycenter, within about 2 miles — a 50-fold improvement over the best estimates provided by ground-based telescopes, NASA officials said.
11 January 2015, 09:00 AM ET
Getting a handle on what rocky worlds in our solar system would look like from afar will give us a basis for comparison as we seek out distant, habitable exoplanets.
07 January 2015, 03:12 PM ET
Skywatchers have a chance to spot the bright planet Jupiter and the moon sparkling brightly in the sky tonight, weather permitting, but only if you know when and where to look.
05 January 2015, 01:42 PM ET
Skywatchers will be treated to a fascinating ballet of the so-called Galilean moons throughout the month, as the satellites pass one another, sometimes blocking (occulting) or casting shadows (eclipsing) and casting shadow onto Jupiter’s cloud tops.
29 December 2014, 07:31 AM ET
Researchers have trained the Hubble Space Telescope on Europa repeatedly since Europa's geysers were first announced last year, in an attempt to confirm and characterize the plumes. But they've come up empty.
15 December 2014, 01:40 PM ET
Skywatchers with telescopes on Earth will be able to witness a remarkable cosmic event tonght: Two of Jupiter's moons will cast shadows on the face of the gas giant in the same night.
08 December 2014, 03:55 PM ET
One of the treats awaiting owners of a new telescope is their first look at the giant planet Jupiter and its four tiny moons.
04 December 2014, 05:10 PM ET
The way we define life has consequences for the search for life on other worlds such as Mars, Jupiter's moon Europa and the Saturn satellite Enceladus.
02 December 2014, 11:00 AM ET
With luck, skywatchers can catch sight of the five brightest planets in the sky this month. Mercury, Mars, Venus, Saturn and Jupiter should all be on display.
24 November 2014, 03:31 PM ET
An incredible, reprocessed picture of Jupiter's moon Europa shows the mysterious natural satellite's amazing colors as they have never been seen before.
24 November 2014, 03:30 PM ET
See photos of Jupiter's ice-covered moon, Europa
21 November 2014, 07:00 AM ET
Binary Earth-size planets that orbit each other might exist around distant stars, researchers say. Simulations suggest such worlds can begin circling each other after slow, grazing collisions.
20 November 2014, 02:01 PM ET
The strength of an alien world's magnetic field may have been deduced for the first time, by analyzing fast winds slamming against it from the planet's star. The research could help gauge the strength of other exoplanets' magnetic fields as well.
17 November 2014, 10:25 PM ET
Learn about the physical characteristics of Saturn and its famous rings, what we know about Saturn’s moons and Saturn’s roots in Greek mythology.
17 November 2014, 02:18 PM ET
The Great Red Spot on Jupiter's face is secretly dull in color. But the swirling storm looks crimson thanks to something like a cosmic "sunburn." Gases in Jupiter's upper atmosphere turn reddish when they're hit with sunlight, scientists say.
15 November 2014, 10:40 AM ET
If you were up late Friday night, or rather awake in the wee hours of Saturday, you may have seen two brilliant objects that will immediately catch your eye if the sky is clear.
14 November 2014, 12:59 AM ET
Jupiter is the largest planet in our solar system, and is known for its many moons, its dangerous radiation belt and its iconic Great Red Spot.
11 November 2014, 07:46 AM ET
Get up early or stay out late to see some of the brightest planets in the night sky this month. The elusive planet Mercury begins November with its best morning apparition for 2014.
05 November 2014, 01:00 PM ET
Several influential congresspeople are among those calling for a mission to Europa, which is regarded by many scientists as the best place to search for life beyond Earth.
17 October 2014, 04:31 PM ET
NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California, has selected proposals from 10 universities to begin investigating the possible use of cubesats as auxiliary components to missions to Europa and beyond.
17 October 2014, 12:56 PM ET
Jupiter and the moon are set to meet up in the early morning sky on Saturday (Oct. 18).
02 October 2014, 12:40 PM ET
Look up to see planets parading across the sky this month. A series of planets, big and small, will reveal themselves to skywatchers on Earth, if weather permits.
27 September 2014, 07:00 AM ET
For a couple of hours after nightfall Sunday (Sept. 28), Mars will be a fairly conspicuous light. The Red Planet will have a companion this evening; sitting below and to its left will shine the reddish 1st-magnitude star Antares.
08 September 2014, 11:30 AM ET
Big slabs of ice are sliding over and under each other within Europa's ice shell, a new study suggests. The Jovian satellite may thus be the only solar system body besides Earth to possess an active system of plate tectonics.
05 September 2014, 06:40 AM ET
In December 2013, researchers using NASA's Hubble Space Telescope announced they had spotted evidence of geysers erupting from Europa's south polar region. But follow-up Hubble observations in January and February showed no signs of the plumes.
02 September 2014, 05:03 PM ET
Electric sparks might have helped break down lunar soil, suggesting the moon may be significantly more active than previously thought. The phenomenon may take place throughout the solar system, from Mercury to the moons of Jupiter and Saturn.
02 September 2014, 10:53 AM ET
In the evening, Mars and Saturn can be seen in the southwestern sky. Jupiter can be viewed in the eastern sky in the early morning hours. Also, the Moon adds additional light for farmers to harvest their crops.
23 August 2014, 10:34 AM ET
A Soyuz ST-B rocket blasted off from the European Spaceport in Kourou, French Guiana with a payload of two Full Operational Capability (FOC) satellites for the Galileo constellation.
22 August 2014, 06:00 AM ET
Scientists discuss what makes Jupiter's moon Europa perhaps the solar system's best bets for hosting life beyond Earth.
20 August 2014, 12:45 PM ET
Boring through ½ mile rock-hard Antarctic ice, researchers discover a completely isolated community of microorganisms living in Subglacial Lake Whillans. The finding could be an analog for subsurface life on Mars, Europa, Enceladus and other worlds.
15 August 2014, 02:39 PM ET
The morning star and the gas giant start their convergence on Aug 15th and it culminates in a 'cosmic triangle' when a slender crescent moon joins the party on August 23rd.
04 August 2014, 05:05 PM ET
Astronomers imaged three monster eruptions on Jupiter's moon Io over a two-week span in August 2013 and released the photos Monday (Aug. 4). The frequency of the blasts surprised researchers, who had recorded just 13 huge Io eruptions from 1978 to 2006.
22 July 2014, 02:57 PM ET
Created by lightning, ‘whistlers’ travel along Earth's magnetic field lines from hemisphere to hemisphere. Jupiter’s charged particles ‘sing’ across its magnetosphere (recorded by Voyager).
-- 'Whistling' Volcanic Lightning: http://goo.gl/kKhlEk
18 July 2014, 11:00 AM ET
Fragments of Comet Shoemaker-Levy 9 struck planet Jupiter in July 1994.