Making an informed decision on which specific destinations warrant sending human explorers requires more data than what the best Earth-based telescopes can provide.

However, this crater size tests the limit of visual perception of Earth-based telescopes.

No topography is visible on Mars from Earth-based telescopes.

Neptune now has eight known moons, two of which were discovered from Earth-based telescopes.

Measurements confirmed the strong presence of water ice previously detected by Earth-based telescopes.

For the past several days, Earth-based telescopes have been trained on Jupiter.

The storm is large enough to be visible through Earth-based telescopes with an aperture of 12 cm or larger.

That is, the planet always appears nearly fully illuminated when viewed through Earth-based telescopes.

Earth-based telescopes also spotted a jump in the number of organic molecules flying out from the comet after the impact.

Today, after decades of surveillance with Earth-based telescopes and radars, the rocky body is thought to be about 25 miles long.