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Sea-surface temperature in the southern Atlantic and Indian oceans surrounding Africa and Madagascar. High temperatures are evident between Madagascar and the mainland, while temperatures cool as waters near the Antarctic.

Dark galaxies are small, gas-rich galaxies in the early Universe that are very inefficient at forming stars.

A team of astronomers using NASA's Hubble Space Telescope is reporting the discovery of another moon orbiting the icy dwarf planet Pluto.

Images from NASA's Cassini spacecraft show a concentration of high-altitude haze and a vortex materializing at the south pole of Saturn's moon Titan, signs that the seasons are turning on Saturn's largest moon.

70% of all catalogued objects are in low-Earth orbit (LEO), which extends to 2000 km above the Earth's surface. To observe the Earth, spacecraft must orbit at such a low altitude. The spatial density of objects increases at high latitudes.

Astronomers have puzzled over why some puny, extremely faint dwarf galaxies spotted in our Milky Way galaxy's back yard contain so few stars.

Vela C region

This close-up image captured by NASA’s Solar Dynamics Observatory (SDO) shows the July 6, 2012 X-class flare captured in the 171 Angstrom wavelength.

Copernicus crater central peak casts a long shadow to the west over a crater floor that was flooded with impact melt that cooled and hardened to form this spectacular landscape.