It measures 130 to 300 feet across, a pebble compared to the asteroid that killed the dinosaurs, which is estimated to have been six to nine miles in length. On the other hand, on Feb. 15, 2013, an ...

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In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small and in the Milky Way, while Curtis took a more radical position that they ...

Where is all the water that may form oceans on distant planets and moons? The SPHEREx astrophysics mission will search the ...

Astronomers at NASA have caught a glimpse of a star system whipping through space at an unprecedented speed. While the system ...

An asteroid named 2024 YR4 has a 2.1% chance of striking Earth on December 22, 2032, with potential impact zones identified ...

The $10 billion orbiting observatory will give astronomers a better sense of the near-Earth asteroid 2024 YR4's size and ...

Scientists across the world, including some in Arizona, are keeping an eye on an asteroid that has a very slim chance of ...

A bouquet of thousands of stars in bloom has arrived. This composite image contains the deepest X-ray image ever made of the ...

Astronomers are closely tracking Asteroid 2024 YR4, which has a small but notable chance of colliding with Earth in 2032.

Even the smallest odds of an impact sound alarming, but scientists’ ability to calculate them is actually good news.

NASA's Nancy Grace Roman Space Telescope team has successfully integrated the mission's deployable aperture cover—a ...