As astrotourism continues to take off, more travelers are planning trips on Earth based on night sky events—from solar eclipses and rare supermoons to the annual Perseid meteor shower. And while many of us mourn the early sunsets that fall brings, the extra hours of darkness offer an opportunity to tune into the celestial movements above.

NASA scientists have calculated that Earth will capture a "second moon" on Sunday (Sept. 29). The "mini-moon" comes in the form of the tiny asteroid 2024 PT5, which usually orbits the sun as part of a small asteroid belt that follows Earth.

Earth will capture a miniature, “second moon” this week, according to NASA scientists. The new moon is actually a tiny asteroid dubbed 2024 PT5. It will start orbiting the planet in a horseshoe path and stick around for a little less than two months before escaping Earth’s gravitational pull and going back to its regular orbit around the sun.