Using a superconducting X-ray laser, researchers at SLAC achieved a temperature 4 degrees Fahrenheit above absolute zero.
Mercury is the closest planet to the sun, the fastest planet orbiting the sun and the smallest planet in our solar system.
Reference Jupiter is the largest planet in the solar system, with moons, rings and beautiful clouds.
The internet erupted after a photograph from the Mars Curiosity rover appeared to show an "alien door," experts are pretty sure it's just a natural feature.
Reference Uranus is a strange world in the solar system that spins on its side. A new probe that will visit Uranus in the coming decades could unlock even more secrets about this peculiar planet.
Reference Saturn is one of the most beautiful worlds in the solar system, with spectacular rings and moons that could host life.
Reference Venus is Earth's next-door neighbor and could be Earth's twin, if not for the sulfuric acid clouds and hellish surface temperatures.
When a lunar eclipse occurs and our lone satellite inches into Earth's shadow, the moon's face becomes painted red. Here's why.
The James Webb Space Telescope's four science instruments are 'perfectly aligned' and ready to begin observations this summer, NASA said in a news conference.
A mixed-up region of sunspots pointed almost directly at Earth just emitted a major solar flare, which could cause havoc with power grids and communication networks.
Russian space chief Dmitry Rogozin has apparently threatened Elon Musk, but the SpaceX founder and CEO doesn't seem too bothered.
Reference Lunar eclipses occur when the moon falls into Earth's shadow, creating a blood moon, and can be total, partial or penumbral. Here's when one will happen next.