Space & Astronomy

Track the ISS, browse NASA's daily photo, and explore the night sky, instantly in your browser.

Moon Phase Calculator

Find today's moon phase, or the moon phase for any date.

ISS Tracker

See exactly where the International Space Station is right now, live.

Astronomy Picture of the Day

NASA's daily photo of the cosmos, with the full story behind it.

Next SpaceX Launch

A live countdown to the next scheduled SpaceX launch.

Constellation Finder

Find out which constellations are visible tonight, based on your month and hemisphere.

Planets Visible Tonight

See which planets are above your horizon right now, and which direction to look.

Choosing and using space & astronomy

Explore current spacecraft information, sky guides, moon phases, and astronomy imagery from one place. Some pages use your date, approximate location, or live data from an external provider; others explain predictable cycles with calculations. Each tool states what information it needs and what the result represents.

Tips for reliable results

Visibility depends on clouds, terrain, city lights, latitude, season, and the freshness of schedule data. Confirm launches and time-sensitive events with the responsible space agency shortly before viewing. Never look directly at the Sun without certified solar-viewing protection, including during an eclipse.

Choose a tool above to see its inputs, method, privacy notes, examples, limitations, and answers to common questions. Related tools are linked on every page so you can continue a task without returning to search.