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The Oort Cloud Could Have More Rock Than Previously Believed

The Oort Cloud is a collection of icy objects in the furthest reaches of the Solar System. It...

Asteroids Didn’t Create the Moon’s Largest Craters. Left-Over Planetesimals Did

The Moon’s pock-marked surface tells the story of its history. It’s marked by over 9,000 impact craters, according...

Comets Leave Dusty Trails That Surround the Solar System

Comets are messy things. They scatter bits of dust as they travel through the solar system. If...

Will We Ever Go Back to Explore the Ice Giants? Yes, If We Keep the Missions Simple and Affordable

It’s been over 35 years since a spacecraft visited Uranus and Neptune. That was Voyager 2, and it...

Baby Gas Giants Cast Shadows on Their Siblings

A team of astronomers has caught glimpses of gas giants forming around a very young star. The nascent...

Astronomers Directly Image a Jupiter-Sized Planet Orbiting a Sunlike Star

According to the most widely-accepted theory, planetary systems form from large clouds of dust and gas that form disks...

Mars Once had Enough Water for a Planet-Wide Ocean 300 Meters Deep

Today, Mars is colloquially known as the “Red Planet” on a count of how its dry, dusty landscape is...

Will Triton finally answer, ‘Are we alone?’

We recently examined how and why Saturn’s icy moon, Enceladus, could answer the longstanding question: Are we alone? With...

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