Our Moon’s appearance changes nightly. As the Moon orbits the Earth, the half illuminated by the Sun first becomes increasingly visible, then decreasingly visible. The featured video animates images taken […]

You have to take a long hike to see the Troll’s Tongue — ten hours over rocky terrain. And in this case, it took three trips to capture the landform […]

If you could stand on Mars — what might you see? If you were NASA’s Curiosity rover, just last month you would have seen the view from Vera Rubin Ridge, […]

This is the mess that is left when a star explodes. The Crab Nebula, the result of a supernova seen in 1054 AD, is filled with mysterious filaments. The filaments […]

In full view, the amazing six-sided jet stream known as Saturn’s north polar hexagon is shown in this colorful Cassini image. Extending to 70 degrees north latitude, the false-color video […]

Delicate in appearance, these filaments of shocked, glowing gas, are draped across planet Earth’s sky toward the constellation of Cygnus. They form the western part of the Veil Nebula. The […]

What do spiral galaxies look like sideways? Featured is a sharp telescopic view of a magnificent edge-on spiral galaxy NGC 3628, a puffy galactic disk divided by dark dust lanes. […]

What’s happened to the Moon? Nothing, but something has happened to the image of the Moon. The heat from a volcanic lava fountain in the foreground has warmed and made […]

Are Saturn’s auroras like Earth’s? To help answer this question, the Hubble Space Telescope and the Cassini spacecraft monitored Saturn’s North Pole simultaneously during Cassini’s final orbits around the gas […]

It was one of the most powerful solar flares in recorded history. Occurring in 2003 and seen across the electromagnetic spectrum, the Sun briefly became over 100 times brighter in […]