NASA astronaut Nichole Ayers, from aboard the International Space Station, captured a stunning photo of the May 2025 "Flower Moon" as it rose over Earth's horizon. Hovering 260 miles above the planet ...

The moon's nearside (that is, the side facing Earth) is dark-colored and dominated by ancient lava flows, whereas the farside ...

The quirks of light moving through gas are the cause of stellar twinkling, which can be a bane—and sometimes a boon—for astronomers ...