Size, distance, risk and what scientists will learn.
The 2004 scare, how the risk was removed, and what could still change its orbit.
Where, when and with what equipment.
How the two compare in size and energy.
From asteroid surveys to NASA's DART mission.
A simple guide to space-rock terms.
Where the rumor started and what the evidence says.
What official reports have found and the most common explanations.