Longitude methods As Newton and others rightly concluded, you can measure longitude by calculating the moon’s angle in relation to certain stars (the lunar distance method). You can also achieve the ...

The Earth-Moon-Sun system has traditionally provided the best laboratory for testing the strong equivalence principle. For a decade, the Apache Point Observatory Lunar Laser-ranging Operation (APOLLO) ...

Astrobotic, the company that makes the lander, published an update Friday saying the lander had traversed 238,000 miles, putting it as far from the Earth as our Moon. Peregrine’s post-launch ...

But when the Sun, Earth, and Moon all align to produce a total eclipse, it teach us how far astronomical distances truly are. During a lunar eclipse, the Earth's shadow falls on the Moon; showing that ...