Target selection

2 articles

How many near-Earth asteroids are there, and how many are worth a closer look?

More than 42,000 near-Earth asteroids are known. Filter by size, trajectory cost, and known composition, and the list shrinks fast. A sourced walk through NASA and JPL data.

October 21, 2026 Read article

Remote sensing Target selection

Why survey first: how remote sensing narrows asteroid resource targets

Telescopes, orbiting instruments, and small samples each answer different questions about an asteroid. How the layers fit together, using missions NASA, JAXA, and ESA have flown.

October 19, 2026 Read article