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Getting the Scale

The solar system is big. Really big. It’s almost three billion miles from the Sun to Neptune, the most distant major planet. It’s more than three billion miles to Pluto. And it’s more than twice that far to the edge of the Sun’s magnetic “bubble” – the boun…

Orionid Meteors

Some high-speed bullets are firing across the night sky this week. They’re the bits of debris that produce the Orionid meteor shower – small pebbles left behind by Comet Halley. They hit the atmosphere at about 150,000 miles per hour. They vaporize almost instantly, forming the glowing …

Missing Sibling

A meteorite found in the Sahara Desert could be a fragment of a destroyed sibling of Earth. The small planet might have been blasted to rubble when the solar system was young. Some of the planet’s remains could have been incorporated into the other rocky worlds, including Earth. NWA 12774 is…

Meteor’ology

Meteorology is the study of Earth’s atmosphere and its weather and climate. Despite the name, it has nothing to do with meteors – at least not directly. But more broadly, meteors and meteorology are related – in their names. Both words come from a Greek word that meant “the …

Ancient Meteorites

The oldest objects on Earth didn’t come from our home planet. They were born in space more than four-and-a-half billion years ago. They fell to Earth as the most common type of meteorite. Chondrites account for about 85 percent of all meteorites. They’re named for tiny round beads of m…
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