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The Sun: Five years in three minutes

The Sun. Credit: NASA Solar Dynamics Observatory.
This amazing video of the sun from NASA’s Solar Dynamics Observatory (SDO) shows five years of sun time in three minutes. The SDO scientists took a picture of the sun [...]

March of the moons

Three of Jupiter's largest moons move across its face.
The image on the left shows the Hubble observation at the beginning of the event. On the left is the moon Callisto and on the right, Io. The shadows from Europa, which cannot [...]

Superstar Eta Carinae

Eta Carinae's great eruption in the 1840s created the billowing Homunculus Nebula, imaged here by Hubble. Now about a light-year long, the expanding cloud contains enough material to make at least 10 copies of our sun. Astronomers cannot yet explain what caused this eruption. Image Credit: NASA, ESA, and the Hubble SM4 ERO Team
Eta Carinae is the most luminous and massive stellar system within 10,000 light-years of Earth (the distance light travels in 10,000 years). It is known for its surprising [...]

NASA photographs Saturn

Saturn_NASA_Cassini_PIA11141
Image: IPL/JPL.NASA NASA sent a small spaceship out into space to photograph Saturn.  Here is an image it sent back. Isn’t it [...]

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