Next month, the Earth will come between the sun and the moon, causing the moon to take on an eerie reddish hue.
What scientists thought were four separate star clusters are actually part of one nearly invisible system.
As next-generation telescopes map this outer frontier, astronomers are bracing for discoveries that could reveal hidden planets, strange structures, and clues to the solar system’s chaotic youth.
General Galactic, cofounded by a former SpaceX engineer, plans to test its water-based propellant this fall. If successful, it could help usher in a new era of space travel. That’s a big “if.”
For two weeks, medical experts monitor the astronauts as they remain indoors, live in isolation, and avoid physical touch, all to prevent harmful microbes from traveling to space.
From surveys of the pre-Sputnik skies to analysis of interstellar visitors, scientists are rethinking how and where to look for physical traces of alien technology.
If you want to put people back on the moon, don’t gut the agency in charge of getting them there.
Conditions in the US should be perfect for the final meteor shower of 2025, with no moonlight present to interfere with spotting shooting stars.