Here's the thing almost nobody tells you: you can see satellites with your bare eyes, from a city, on most clear nights. No telescope, no binoculars, no dark-sky pilgrimage. You just need to know what to look for and when.
A satellite looks like a star that's moving. Not streaking like a meteor — gliding. A steady point of light crossing the sky over two to six minutes, fast enough that you can watch it move against the stars, slow enough that you can follow it, point at it, and show someone else.
Satellite or airplane?
The easiest tell: airplanes blink. Aircraft carry flashing anti-collision lights, usually with visible red and green. A satellite never blinks — it's a constant, white-ish point. If it's moving smoothly and it doesn't flash, you're almost certainly looking at hardware in orbit.
The second tell is speed and path. Satellites in low Earth orbit travel about 28,000 km/h and cross your sky in a few minutes on a perfectly straight arc. No banking, no course changes, no sound.
Why you can see them at all
Satellites don't make their own light. You're seeing sunlight glinting off metal and solar panels, hundreds of kilometers up. That's why timing matters so much: the satellite has to be in sunlight while you're in darkness.
That happens in a window after sunset and before sunrise — roughly the first and last couple of hours of night. In the middle of the night, most low-orbiting satellites pass through Earth's shadow and go dark. Sometimes you'll even watch one fade out mid-pass as it slips into the shadow: it dims, reddens slightly, and vanishes. That's not a UFO — that's orbital sunset.
What "brightness" means
Astronomers measure brightness in magnitude — and confusingly, lower numbers are brighter. The brightest star in the night sky, Sirius, is about magnitude −1.5. The International Space Station can hit magnitude −4, brighter than everything in the night sky except the Moon. A decent satellite pass is magnitude 2 or brighter — comfortably visible from a suburb. Fainter than about magnitude 3–4 and city light pollution starts to win.
Your first sighting, step by step
- Start with the ISS. It's the biggest, brightest object in orbit — a genuinely easy target. Our guide to seeing the ISS tonight covers it in detail.
- Get a prediction, not a guess. Passes are precisely predictable — you want to know the exact minute, the direction it rises, and how high it climbs.
- Go out two minutes early. Let your eyes adjust and get your bearings. Know which way is northwest before you need it.
- Look for the moving star. It rises from one horizon, climbs, and crosses. Once you lock on, it's unmistakable.
What's actually up there
More than 30,000 tracked objects orbit Earth right now — active satellites, spent rocket stages, and debris. A surprising number are bright enough to see: the ISS, China's Tiangong station, Starlink satellites (especially fresh "trains"), and hundreds of older satellites and rocket bodies that catch the sun just right.
This is exactly the problem Flyby was built for: it computes which passes will actually be visible from your specific location — factoring in brightness, sun angle, and your local light pollution — and only notifies you when something is genuinely worth stepping outside for. When the moment comes, the AR view points your phone at the sky and puts a marker on the satellite so you can't miss it.