NASA's Lucy will venture as close as 596 miles to this asteroid, an estimated 2 ½ miles in length but much shorter in width.

If future Mars colonizers want to survive without pressure suits, they’ll need to generate a denser atmosphere. One way to ...

Rather, Levison said the asteroid may resemble a bowling pin or even a snowman like Arrokoth, the Kuiper Belt object visited by NASA's New Horizon spacecraft in 2019. The other possibility is that ...