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Following the advent of human space flight, NASA began naming missions after children of Zeus.

Some microbes can withstand Earth’s most inhospitable corners, hinting that life may be able to survive similarly extreme conditions on other worlds.

All across the Universe, planets come in a wide variety of sizes, masses, compositions, and temperatures. And most have rain and snow.

The giant impact theory suggests our Moon was formed from proto-Earth getting a Mars-sized strike. An exoplanet system shows it’s plausible.

The number of planets that could support life may be far greater than previously thought, a recent discovery suggests.

The universe’s largest seismometer reveals clues about the Gas Giant’s interior.

The nearby, bright star Fomalhaut had the first optically imaged planetary candidate. Using JWST’s eyes, astronomers found so much more.

The space telescope’s findings challenge the notion of a galaxy brimming with life.

There’s a limit to how large planets can be, and it’s only about double the radius of Jupiter. At least, so far.

In a distant galaxy, a cosmic dance between two supermassive black holes emits periodic flashes of light.

The stars, planets, and many moons are extremely round. Why don’t they take other shapes?

If there are human-sized creatures walking around on other planets, would we be able to view them directly?

The structure of our Solar System has been known for centuries. When we finally started finding exoplanets, they surprised everyone.

Human beings are tiny creatures compared to the 92 billion light-year wide observable Universe. How can we comprehend such large scales?

Newborn stars are surrounded only by a featureless disk. Debris disks persist for hundreds of millions of years. So when do planets form?

As Uranus approaches its solstice, its polar caps, rings, and moons come into their best focus ever under JWST’s watchful eye. See it now!

Do you think you know the Solar System? Here’s a fact about each planet that might surprise you when you see it!

The story of how Jupiter, Saturn, Uranus and Neptune were made isn’t a universal one. Some gas giants were built different.

The answer may lie in the particular way sand forms on Titan.

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?

Scientists do not know what is causing the overabundance of the gas.

The classic picture of Jupiter’s great rocky core might be entirely wrong.

In the largest star-forming region close to Earth, JWST found hundreds of planetary-mass objects. How do these free-floating planets form?

Some fascinating observations of K2-18b have come along with horrendous, speculative communications. There’s no evidence for oceans or life.

It is humanity’s biggest step yet into the Solar System.

No planet enters retrograde more frequently than Mercury, which does so 3-4 times each year. Here’s the scientific explanation for why.

How can we understand mysterious planets like Jupiter? Use giant lasers!

Many planets will eventually be devoured by their parent star. For the first time, we caught a star in the act, eating its innermost planet!

Some think the reason fundamental scientific revolutions are so rare is because of groupthink. It’s not; it’s hard to mess with success.

Like Mars today, Venus used to be a sci-fi superstar. Recent discoveries could re-ignite our interest in Earth’s “evil twin.”