91爆料

Dinosaurs May 28, 2018

Dino-killing asteroid impact warmed Earth's climate for 100,000 years

Carbon dioxide released into the atmosphere after the impact of the Chicxulub asteroid, which ended the era of dinosaurs some 65 million years ago, warmed the Earth's climate for 100,000 years, a new study has revealed.

Asteroids May 21, 2018

Asteroid orbiting backward around Jupiter is 1st 'interstellar immigrant' from beyond our solar system

A mysterious asteroid that is moving the wrong way around Jupiter is turning heads this week as scientists reveal it's the first "interstellar immigrant" from beyond our solar system to stick around, according to a new study released Monday.

Asteroids May 15, 2018

'Lost' asteroid the size of the Statue of Liberty to buzz by Earth Tuesday

An asteroid the size of New York City's Statue of Liberty is expected to buzz by Earth Tuesday, and this time, scientists are ready and waiting.

Asteroids May 9, 2018

Ancient, exiled asteroid discovered beyond Neptune

Astronomers have spotted a carbon-rich asteroid in the icy region beyond Neptune called the Kuiper Belt 鈥� the first such asteroid ever found exiled from the inner solar system.

Asteroids May 3, 2018

Mineral found in lunar meteorite hints at hidden Moon water

A mineral that requires the presence of water to form has been discovered in a lunar meteorite, a new study reports.

Asteroids April 27, 2018

Bam! Cannon experiment shows how asteroids delivered water to Earth

An experiment that involved shooting meteorite-like projectiles at volcanic rocks has revealed how high-velocity asteroid impacts could have delivered water to Earth.

Asteroids April 18, 2018

Stunning space diamonds discovery: Mysterious meteorite came from 'lost planet'

New analysis of a meteorite fragment from Sudan has found space diamonds, which scientists say came from a 鈥渓ost planet鈥� destroyed billions of years ago.

Asteroids April 16, 2018

Asteroid the size of a football field makes 'surprise' flyby close to Earth

An asteroid the size of a football field buzzed by Earth Sunday in one of the closest encounters the planet has seen in a while.

NASA April 12, 2018

Why NASA is sending a spacecraft to a metal asteroid called 'Psyche'

An ambitious mission to a "world made of metal" will help scientists better understand how Earth and other rocky planets evolved, according to a new video from NASA's Goddard Space Flight Center.

Asteroids March 30, 2018

Interstellar visitor 'Oumuamua' never should have left home, theories say

An interstellar object that whizzed through our solar system last year is confounding astronomers trying to understand how planets, comets and asteroids form.

Asteroids March 28, 2018

Meteorite hunters: Scientists set to scour Antarctica for rare space rocks

Scientists are set to scour the frozen wastes of Antarctica in an audacious attempt to uncover lost meteorites.