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NASA formally announces that asteroid 2024 YR4 now poses "no significant threat" to Earth in 2032 and beyond as the chances of an impact drop to 1-in-59,000 (0.0017%). This means a planetary defense mission to intercept and deflect the object in 2028 during a close flyby of Earth is no longer necessary.
2025-02-24

NASA space probe Lucy flies by asteroid 152830 Dinkinesh, the first of eight asteroids planned to be visited by the spacecraft.
2023-11-1

A 1 m near-Earth asteroid is discovered before falling as a harmless bolide over central Ontario, Canada, at 08:27 UTC. It is the sixth asteroid to be discovered before impacting Earth.
2022-11-19

Astronomers rule out the chances of ~30-meter asteroid 2006 QV impacting Earth in September 2019 by eliminating the possibility of its passing through an area where it would have to be if it were on an impacting orbit. Prior to this, the asteroid had been given a one-in-7,000 chance of impacting Earth.
2019-07-17

2015 TH (previously known as V774104), a 100–400 kilometer asteroid, is announced as possibly the fourth most distant known Solar System object from the Sun at nearly 90 (±10) times Earth's distance from the Sun.
2018-03-13

NASA releases new pictures from the Dawn spacecraft as it approaches from a distance of 238,000 miles of Ceres, the largest object in the asteroid belt between Mars and Jupiter. Dawn will go into orbit around the dwarf planet on March 6.
2015-01-19

Research shows that the Chelyabinsk meteor was the remnants of an asteroid that collided with another asteroid 290 million years before entering the Earth's atmosphere over Russia in February of last year.
2014-05-23

Near-Earth asteroid 2012 DA14 with an estimated diameter of about 50 m comes within 17,200 miles (27,700 km) from the Earth's surface. This distance is a record close approach for a known object of such size.
2013-02-15

NASA announces new data effectively rules out a 2036 Earth impact for the near-Earth asteroid 99942 Apophis.
2013-01-13

Forty-one scientists publish a paper in "Science" affirming that the Cretaceous–Paleogene extinction event, the large-scale mass extinction of dinosaurs and other lifeforms on Earth ~65.5 million years ago, was caused by an asteroid impact.
2010-03-4