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A black hole that hasn't been heard of since 1989 has suddenly become active again and is now the brightest object in the X-ray sky.
NASA's Cassini spacecraft captures an elegant image of three of Saturn's moons as they glow like delicate slivers in space.
NASA's Cassini spacecraft zooms in on the fractured surface of Dione, one of Saturn's many intriguing moons, and delivers a crater-packed close-up.
Dwarf planet Ceres gets weirder as NASA's Dawn spacecraft gets closer. Check out the latest shots from the cosmic paparazzi.
The permanent, turbulent colossal storms at Saturn's poles are a mystery -- but a new model may explain what causes them.
NASA's Dawn spacecraft cozies up to the fascinating dwarf planet Ceres and sends back the best look yet at its oddball bright spots.
The Mars Reconnaissance Orbiter has found something on Mars that might help in the search for past life on the Red Planet.
Someone left a bright nightlight on in the universe. One of NASA's spacecrafts located the shiniest galaxy ever discovered.
A neural implant on the area of the brain that controls the patient's intention to move could be the key to better robotic prosthetics.
Dawn has taken the closest pictures yet of the dwarf planet and started to illuminate the nature of its most glaring mystery.