Earth is the only planet in our Solar System to have a single solitary moon. While others, such as Mercury and Venus, have none, the gas giants have accumulated crowds of orbiting bodies — Saturn, for example, boasts an impressive 62 moons!
This image, taken by the Cassini orbiter, shows its two biggest: Rhea and its larger companion Titan. Titan’s … Read the rest of this article
The same phenomenon that causes a bumpy airplane ride, turbulence, may be the solution to a long-standing mystery about stars’ birth, or the absence of it, according to a new study using data from NASA’s Chandra X-ray Observatory.
Galaxy clusters are the largest objects in the universe, held together by gravity. These behemoths contain hundreds or thousands of individual galaxies … Read the rest of this article
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Among the most interesting landforms on Mars are features referred to as ‘chaotic terrain’. Dozens or even hundreds of isolated mountains up to 2,000 m high are scattered … Read the rest of this article
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Actor John Barrowman (somewhat cringeworthy at the end of the vid!) would like to introduce you to NASA’s new spacecraft.… Read the rest of this article
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On October 19, 2014 the Hubble Space Telescope gathered observations of the close flyby of Comet Siding Spring with Mars.
Join Tony Darnell Dr Carol Christian and Scott … Read the rest of this article
AAVSO Alert Notice 505Ms. Deanne Coppejans (PhD candidate, Radboud University Nijmegen (Netherlands) and University of Cape Town) and colleagues have requested AAVSO observer assistance in monitoring several dwarf novae in support of their campaign to observe them in outburst with the Very Large Array (VLA) to search … Read the rest of this article
Imagine: with a wasteland as their canvas, a Master and his young Apprentice set about turning rubble into planets and moons, asteroids and comets. They levitate the worlds above their heads, spinning them in orbit around their symbolic Sun.
“What is the key to life on Earth?” asks the Master.
The Apprentice shakes her head. The answer is … Read the rest of this article
This composite Hubble Space Telescope image (click image for larger view) captures the positions of Comet Siding Spring and Mars in a never-before-seen close passage of a comet by the Red Planet, which happened at 2:28 p.m. EDT October 19, 2014. On that date the comet passed by Mars at approximately 87,000 miles (about one-third the distance between Earth and … Read the rest of this article
All three NASA orbiters around Mars confirmed their healthy status Sunday after each took shelter behind Mars during a period of risk from dust released by a passing comet.
Mars Odyssey, Mars Reconnaissance Orbiter and the Mars Atmosphere and Volatile Evolution (MAVEN) orbiter all are part of a campaign to study comet C/2013 A1 Siding Spring and possible effects on … Read the rest of this article
Sunsets are always pretty. One sunset this month could be out of this world. On Thursday, Oct. 23rd, the setting sun across eastern parts of the USA will be red, beautiful and … crescent-shaped.
“It’s a partial solar eclipse,” explains longtime NASA eclipse expert Fred Espenak. In other words, the New Moon is going to ‘take a bite’ … Read the rest of this article
The Sun Now (Visible light)
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The Sun Now (H-Alpha light)
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Aurora Oval
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Aurora Oval
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