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Astronomy October 21, 2015

Close pass with 'doomsday' asteroid Apophis

The asteroid Apophis has crossed Earth's path. Now, astronomers will return to their calculators to find out what danger it poses in the future.

Asteroids October 21, 2015

Very close encounter: Enormous asteroid to zip between Earth and moon Wednesday

An asteroid 100 feet wide is set to squeak past the Earth early Wednesday evening, soaring fewer than 218,000 miles from our planet -- slightly closer than the orbit of the moon itself.

Asteroids October 21, 2015

Watch live: Asteroid the size of three football fields to hurtle past Earth

A gigantic asteroid nearly 900 feet wide will race past planet Earth tonight, a harmless but sobering reminder of the dangers posed by such interplanetary visitors.

Astronomy October 21, 2015

Rest in pieces: Comet ISON officially dead, Sun chief suspect

Comet ISON, once optimistically called the comet of the century, is dead, the victim of a way-too-close brush with the sun. It was barely a year old.

NASA October 21, 2015

Russian fireball shows meteor risk may be bigger than once thought

Scientists studying the terrifying meteor that exploded without warning over a Russian city last winter say the threat of space rocks smashing into Earth is bigger than they thought.

Evolution October 21, 2015

Life on Earth may have come from a comet, scientists say

The explosive collisions of icy comets with planets and moons generated the vital building blocks of life, spreading these necessary ingredients throughout the solar system, researchers say.

Asteroids October 20, 2015

Russian meteor was largest in a century

The meteor that crashed to earth in Russia was about 55 feet in diameter, weighed around 10,000 tons and was made from a stony material, scientists said, making it the largest such object to hit the Earth in more than a century.

Astronomy October 20, 2015

Meteor shower created by Halley’s Comet peaks tonight

A meteor shower spawned by history’s most famous comet will peak this weekend, and the show could be dazzling for observers with clear skies, experts say.

Spaceflight October 20, 2015

European comet lander may wake up from space slumber

Europe's Philae comet lander may be about to wake up from its lengthy, unplanned slumber.

Asteroids October 20, 2015

Time-lapse video shows powerful asteroids strike Earth with surprising frequency

Since the start of the 21st century, dozens of incoming asteroids have slammed into Earth, some of them packing far more energy than a city-destroying atomic bomb, a new animation illustrates.

Asteroids October 20, 2015

Southern California sky lights up with reported fireball

Southern Californians from Santa Barbara to San Diego have reported seeing a fireball that forecasters said was most likely a meteor streaking across the sky.