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To know how to protect its astronauts, NASA needs to first understand the threat.

Until the Apollo missions, we had no idea how the moon got here, just a series of educated guesses. They rewrote the story of the moon’s origins.

Time is relative, not absolute, as gravity and motion both cause time to dilate. Your head and feet, therefore, don’t age at the same rate.

Newton thought that gravitation would happen instantly, propagating at infinite speeds. Einstein showed otherwise; gravity isn’t instant.

Life became a possibility in the Universe as soon as the raw ingredients were present. But living, inhabited worlds required a bit more.

Before Constantine received his history-defining vision, a pagan Sun god paved the way for Jesus Christ’s triumphal entry into the Eternal City.

Most of us have heard that the Sun is an ordinary, typical, unremarkable star. But science shows we’re actually anything but average.

Recasting the iconic Carrington Event as just one of many superstorms in Earth’s past, scientists reveal the potential for even more massive eruptions from the sun.

Massive objects like black holes, stars, and rogue planets routinely pass near our Solar System. An ensuing comet storm could destroy us.

Carl Sagan was far from the first to declare we are the children of ancient stars.

Plato, Sun Tzu, and Buddha all lived in a “golden age” of philosophy that laid the foundation of modern thought.

The Big Bang theory is not threatened, but astrophysicists have some explaining to do.

As the Earth spins and wobbles on its axis and revolves elliptically around the Sun, each day changes from the last. “24 hours” isn’t right.

Space weather poses a tremendous threat to all satellites, knocking all computer systems offline. Is that a recipe for Kessler syndrome?

There are 40 billion billion black holes in the universe. Here’s how our Solar System stacks up against ten of them.

A recent paper in the journal Physical Review Letters claims to prove that a “kugelblitz” is not possible.

A look back at the rise of solar power in the US and what’s next.

With a telescope at just the right distance from the Sun, we could use its gravity to enhance and magnify a potentially inhabited planet.

Each December, the Geminid meteor shower puts on a show for skywatchers across Earth. With a new Moon at 2023’s peak, it’ll be outstanding!

Matter is made up largely of atoms, where atomic nuclei can contain up to 100 protons or more. But how were the heaviest elements made?

Here on Earth, the Sun is our primary source of light, heat, and energy. But it also poses a grave threat to human civilization.

Each year in mid-August, Earth plows through the debris stream of an enormous comet, creating the Perseids. 2023’s show will be magnificent!

On December 9, 2023, Halley’s Comet reached aphelion: its farthest point from the Sun. As it returns, here are 10 facts you should know.

In our Solar System, even the two brightest planets frequently align in our skies. But only rarely is it spectacularly visible from Earth.

Australia’s AAPowerLink boasts three global superlatives: largest solar farm, largest battery, and longest power cable.

Scientists have been chasing the dream of harnessing the reactions that power the Sun since the dawn of the atomic era. Interest, and investment, in the carbon-free energy source is heating up.

For some reason, when we talk about the age of stars, galaxies, and the Universe, we use “years” to measure time. Can we do better?

In revolutionary Russia, a group of forward-thinking philosophers offered an alternative to both futurism and communism.

The detection of two celestial interlopers careening through our solar system has scientists eagerly anticipating more.

The “Ring Nebula,” known for almost 250 years, is so much more than a Ring. With JWST’s capabilities, we’re seeing more than ever before.