Nola Taylor Tillman

Reference Roughly 80% of the mass of the universe is made up of dark matter, a material that scientists cannot directly observe. So why do scientists think it dominates?

Reference The wormhole theory postulates that a theoretical passage through space-time could create shortcuts for long journeys across the universe.

Reference The OSIRIS-REx asteroid-sampling mission delivered pieces of asteroid Bennu to Earth on Sept. 24, 2023, before moving on to study asteroid Apophis in 2029.

Reference A red giant star is a dying star in the last stages of stellar evolution. Our own sun will turn into a red giant, expand and engulf the inner planets — including Earth.

Reference NASA's Perseverance rover isn't just exploring the Red Planet. The life-hunting robot will also help a little bit of Mars make it to Earth a decade or so from now, if all goes according to plan.

Reference NASA is the United States space agency and was founded in 1958 to do human and robotic exploration of the solar system and to study the universe as well.

Reference Tycho Brahe was a pioneering Danish astronomer from the 16th century whose data collection and discoveries changed the way scientists looked at the skies.

Reference Saturn has the most moons of any other planet in the solar system. Here we explore some of the 146 moons that orbit the ringed planet.

Reference Sir Isaac Newton invented calculus and explained optics. His most significant work involved forces and the development of a universal law of gravity.

Reference Black holes are real, they're some of the strangest objects in space. Discover what black holes are and how they form with our informative black hole guide.

Reference Delve into the life and theories of Stephen Hawking; one of the greatest theoretical physicists in history.

Reference The largest known star in the universe is UY Scuti, a hypergiant with a radius around 1,700 times larger than the sun.

Reference We are living in a golden age of Milky Way research and exploration.

Reference Olympus Mons rises 16 miles above the Martian surface, making it the solar system's tallest volcano.

reference Most stars are main sequence stars that fuse hydrogen to form helium in their cores - including our sun.

Reference NASA's Parker Solar Probe is on a mission to study the sun closer than ever before. Learn more about the fastest spacecraft to date in our solar probe guide.

Earth and other planets could have formed according to two different theories.

Reference This gas giant is the largest planet in the solar system, but just how big is Jupiter?

Reference NASA's Space Launch System aims to carry humans far beyond Earth.

Reference White dwarfs are hot, dense remnants of stars. They are the last observable stage of evolution for low and medium-mass stars including our sun.