NASA Analysis: Earth Is Safe From Asteroid Apophis for 100-Plus …
2021年3月26日 · Estimated to be about 1,100 feet (340 meters) across, Apophis quickly gained notoriety as an asteroid that could pose a serious threat to Earth when astronomers predicted …
Close calls: How many asteroids have narrowly missed Earth?
2023年10月9日 · Another significant near-miss was 2019 OK, a city-block-sized asteroid that zipped within 45,000 miles (72,000 kilometers) of Earth in 2019 — a cosmic hair’s breadth in …
Apophis - NASA Science
Asteroid 99942 Apophis is a near-Earth object (NEO) estimated to be about 1,100 feet (335 meters) across. When it was discovered in 2004, Apophis was identified as one of the most …
Revealed: First image of huge meteor explosion over Earth last …
2019年3月18日 · The huge meteor explosion hit Earth in December but was only spotted by researchers last week, and now we have visual evidence thanks to the camera of the …
Largest Asteroid To Pass This Close To Earth in a Century - NASA
On the evening of Thursday, July 24, a football-field-sized asteroid passed close to the Earth with very little warning. The asteroid, designated 2019 OK, approached Earth at about 40,400 miles …
2019 OK - NASA Science
In Depth Near-Earth asteroid 2019 OK is a football-field-sized asteroid that safely passed close to Earth on July 24, 2019, with very little warning. During its close pass by Earth, the asteroid …
A giant asteroid crash caused an ancient ice age on Earth, but …
2019年9月18日 · Earth endured an ancient ice age 466 million years ago when a giant asteroid broke apart and sent waves of dust toward our planet over the next 2 million years, according …
How Astronomers Missed the Massive Asteroid That Just Whizzed Past Earth
2019年7月26日 · Ranging in size from 187 to 427 feet (57 to 130 meters) wide, the space rock named 2019 OK snuck up on us Thursday morning (July 25). It swung as close as 45,000 …
Apophis: The infamous asteroid we thought might hit us | Space
2022年12月14日 · Although Apophis will not hit Earth anytime soon, the asteroid will make a close encounter with our planet on April 13, 2029, when it will pass within just 19,000 miles (31,000 …
This asteroid is one of the most likely to hit Earth. Here’s what it ...
2021年8月11日 · For hundreds of millions of years, a top-shaped rubble pile called Bennu has orbited the sun in relative isolation. The asteroid, about a third of a mile wide at its equator, …