This image of Jupiter’s southern hemisphere was captured by NASA’s Juno spacecraft as it performed a close flyby of the gas giant planet on Dec. 16.

Wide enough to contain Earth, the Great Red Spot is the most dominant atmospheric feature in the planet's southern hemisphere.

Well, here's a close-up image of the Andromeda Galaxy - each dot is a star This image was taken by the Hubble Space Telescope, the largest and sharpest image ever taken from the Andromeda Galaxy. The full image contains 1.5...

The main attraction of comets is their shiny long tail. Most of a comet will be frozen ice. This frozen part, about a kilometer in size, is called the nucleus. The nucleus contains ice, dust, and frozen gases. As the...