The Ancient Trappist-1 System

We live in a cosmic Wonderland filled with weird worlds that perform a fantastic celestial ballet within the distant systems of stars beyond our ow ... read more

A Fond Farewell To A Misty Moon

With its gossamer rings sparkling with a mesmerizing frozen sea of icy moonlets and twirling icy fragments and particles, the gas-giant Saturn is a ... read more

The Mystery Of Our (Mostly) Missing Universe

Almost 14 billion years ago, our Universe burst into existence in the form of an unimaginably tiny soup of densely packed, searing-hot particles, c ... read more

A Superluminous Supernova Surprise

Supernovae are the most brilliant and powerful stellar blasts known, and their fierce traveling light can be observed all the way out to the very e ... read more

The Mysterious Magnetic Personality Of Our Star

Our Solar System emerged about 4.56 billion years ago from the mixed remnants still lingering from the long-dead, nuclear-fusing searing-hot cores ... read more

The Seas of Mars

Mars was wet once, but wet with what? Mars was a planet with lakes and rivers. Satellites map washes and basins left behind when the planet dried u ... read more

Earth's Moon Has A Soggy Secret

In the tragicomedy that characterizes human relationships, it has been said that the closer we get to someone, the weirder that person gets. Earth' ... read more

A Previously Hidden Supercluster Of Galaxies Reveals Its Presence

The starlit fires of the first galaxies ignited a very long time ago, and began to light up the primordial Universe less than a billion years after ... read more

The Spirit of the Universe Shines Forth in the Stars

The great continent of Australia is special in many ways not least of all because of the views of the night sky. In the wide blue yonder which is t ... read more

A New Theory Of Planet Birth Muddies The Issue

Our Solar System's Main Asteroid Belt, located between the orbits of Mars and Jupiter, is the home of a swarming sea of dancing rocky ... read more

The Sky Is Teeming With Life

The sky is teeming with life. Five hundred years ago, the Inquisition burned people at the stake for suggesting that the stars might be other suns ... read more

Juno Looks Into The Eye Of The Storm

Jupiter's Great Red Spot has been a swirling mystery for centuries--an enormous wildly whirling storm that has lingered in its planet's sk ... read more

Stellar Runaways From Another Galaxy

Hypervelocity stars are fascinating stellar sprinters that travel so fast that they can reach escape velocity--and in this way break free ... read more

It's A Galaxy-Eat-Galaxy Cosmos

Big galaxies are our Universe's bullies. Snacking ruthlessly on their smaller galactic kin, these massive galaxies have stopped producing stars of ... read more

Twinkle, Twinkle Quasi-Star

Quasars, or quasi-stellar radio sources, are the most remote and energetic members of a class of bizarre objects that are collect ... read more