384 Libra’s Stars

Libra is Latin for weighing scales, making it the only constellation of the Zodiac representing an inanimate object. At 538 square degrees, Libra ranks 29th overall in terms of size. It doesn’t have any first magnitude stars, making it relatively faint but not impossible to view with the naked eye. Libra is in the Southern […]

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385 Titan

Saturn’s moon Titan and Earth are even more alike than previously thought: New research shows that the giant moon has a global sea level, just like our own planet. Earlier observations have shown that Titan has a dense, Earth-like atmosphere, as well as stable liquids on its surface—although Titan’s seas consist of hydrocarbons like methane […]

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386 Galileo Spacecraft

ABOUT THE MISSION While its aim was to study Jupiter and its mysterious moons, which it did with much success, NASA’s Galileo mission also became notable for discoveries during its journey to the gas giant. It was the first spacecraft to visit an asteroid — two in fact, Gaspra and Ida. Galileo provided the only […]

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389 Water on TW Hydrae’s Planet

ALMA image of the disc around the young star TW Hydrae that we see face-on from Earth. ALMA obtained its best image of a protoplanetary disc to date, revealing the classic rings and gaps that signify planets are in formation in this system. Image credit: S. Andrews (Harvard-Smithsonian CfA); B. Saxton (NRAO/AUI/NSF); ALMA (ESO/NAOJ/NRAO). Discs […]

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390 Pandora and Prometheus

Prometheus orbits Saturn just inside the skinny F ring. It Saturn’s most elongated known moon, being about 148 kilometers long but only 68 kilometers wide. Its periodic encroachment into the F ring creates the dark lanes visible in the inner part of the ring. This photo was taken March 15, 2015 as a part of […]

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