Star Size Comparison
How big is our Sun compared to other stars? In a dramatic and popular video featured on YouTube, the relative sizes of planets and stars are shown from smallest to largest. The above video starts with Earth’s Moon and progresses through increasingly larger planets in our Solar System.
Scientists have estimated at least 50 billion planets in the Milky Way
Scientists have estimated the first cosmic census of planets in our galaxy and the numbers are astronomical – at least 50 billion planets in the Milky Way.
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The beauty of Saturn rings
The rings of Saturn are the most extensive planetary ring system of any planet in the Solar System. They consist of countless small particles, ranging in size from micrometres to metres, that form clumps that in turn orbit about Saturn.
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Neptune completes one solar circuit since discovered
Neptune was discovered in 1846. In 2010, astronomers observe as the farthest planet from the sun (sorry, Pluto) completes its first full solar orbit since then, a journey of some 17 billion miles.
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Dual crater on Mars
If a meteorite breaks in two shortly before hitting the ground, the typical bowl shape of a single impact crater becomes doubled. The two circular blast regions intersect, creating a straight wall separating the two craters.
Image credit: NASA/JPL-Caltech/ASU
Arkhangelsky Crater Dunes on Mars
This observation shows dunes on the floor of the large, degraded Arkhangelsky Crater in the Southern hemisphere of Mars.
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Santa Maria Crater on Mars
This image from NASA’s Mars Exploration Rover at the edge of “Santa Maria” crater shows diverse textures of the crater.
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Saturn’s Moon Rhea from Cassini spacecraft
Newly released for the holidays, images of Saturn’s second largest moon Rhea obtained by NASA’s Cassini spacecraft show dramatic views of fractures cutting through craters on the moon’s surface, revealing a history of tectonic rumbling.
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Mars Odyssey- Polar Dunes
A sea of dark dunes, sculpted by the wind into long lines, surrounds the northern polar cap covering an area as big as Texas.
