Latest articles by Nola Taylor Tillman
What is the temperature on Mars?
Reference The temperature on Mars doesn't get much above 70 degrees F and it drop down to nearly minus 200 degrees F, making it a relatively cold planet.
Hubble Space Telescope: Pictures, facts & history
Since its 1990 launch, the Hubble Space Telescope has provided countless amazing images and contributed to many big discoveries. Learn more here.
How big is the moon?
Reference How big is the moon? Our moon is the fifth largest moon in the solar system, with a radius of 1,079.6 miles (1,737.5 kilometers).
How big is the universe?
Reference Based on what we can observe, the universe appears to be almost 28 billion light-years in diameter. However, it is far larger than that.
How was the moon formed?
Reference There are three theories as to how Earth's satellite could have been created.
Nicolaus Copernicus biography: Facts & discoveries
Nicolaus Copernicus proposed his theory that the planets revolved around the sun in the 1500s, when most people believed that Earth was the center of the universe.
How did Earth form?
Earth and other planets could have formed according to two different theories.
Nibiru: The Nonexistent Planet
Nibiru has been linked to NASA, and is also sometimes referred to or confused with Planet X, another supposed world for which there is no evidence.
Carl Sagan: Cosmos, Pale Blue Dot & famous quotes
Reference Carl Sagan was a scientist and educator best known for his TV series Cosmos, the Pale Blue Dot image of Earth and quotes about life and Earth.
How old is Earth?
Scientists have calculated that Earth is 4.54 billion years old, with an error range of 50 million years.
Multiple supernovas may have implanted our solar system with the seeds of planets
Multiple exploding stars may have seeded the solar system with material required to form planets.
Marsquakes reveal Red Planet has surprisingly large core, thin crust
The first detected quakes on Mars suggest that the Red Planet has a larger core, potentially thinner crust and slightly different composition than scientists had thought.
Cosmic fireworks in nearby galaxies shine light on star formation
The brilliant fireworks of 90 nearby galaxies shine new light on how stars are born.
Does the moon rotate?
Yes, the moon rotates on its axis. The moon's rate of rotation nearly matches its orbital period, which keep the same side facing Earth.
How was the sun formed?
Material from the solar system's creation clumped together to form our closest star.
'Symbiotic stars' caught snacking on each other outside the Milky Way
Stars snacking on their companions outside the Milky Way have been precisely mapped and measured for the first time.
Dream Chaser space plane's first flight slips to 2022 due to pandemic-related delays
Delays, many related to COVID, have pushed the first flight of the Dream Chaser space plane to 2022.
Big dust storms may have driven off much of Mars' water
Martian dust storms have helped to strip water from the red planet.
Boulders on asteroid Bennu shed new light on the space rock's history
The near-Earth asteroid Bennu continues to reveal its secrets to NASA's OSIRIS-REx mission.
2014 MU69: Arrokoth, the most distant object ever explored
New Horizons' historic flyby of the KBO 2014 MU69, also known as Arrokoth, has revealed incredible insights about the birth of the solar system.
Venus, once billed as Earth's twin, is a hothouse (and a tantalizing target in the search for life)
As Earth's twin, Venus offers much in the search for life and habitable worlds.
Students grow 'rocket lettuce' from space seeds
Students across the United Kingdom grew seeds that spent six months in space to learn how they would grow once back on Earth.
Meet 'Tenacity': 1st Dream Chaser space plane gets a name
The first orbital Dream Chaser space plane recently got its wings, and a name: Tenacity.
