Cosmik is a free, no-login web app that tracks the ISS, Starlink and over 20,000 satellites live in 3D, shows the real-time rocket launch schedule, and sends alerts so you know exactly when to look up. It runs entirely in your browser.

Yes. Cosmik is completely free with no login required. Optional push and email alerts are also free; the project is supported by donations.

How do I track the ISS with Cosmik?

Open Cosmik, search for the ISS (or any satellite), and follow it. Cosmik computes the next visible pass over your location and can send a push or email alert a few minutes before it flies over so you can step outside and watch.

Does Cosmik track rocket launches?

Yes. Cosmik shows the live upcoming launch schedule with countdowns, status, and embedded webcasts, and can alert you before liftoff for launches you follow.

How accurate is Cosmik's satellite tracking?

Cosmik propagates official CelesTrak orbital data (TLEs) with the SGP4 model in your browser — the same physics professional trackers use — for accurate real-time positions and pass predictions.

Falcon 9 Block 5 | Starlink Group 17-39 — launch time, how to watch (20 July 2026)

Publié 10 juillet 2026 · Mis à jour 10 juillet 2026

Falcon 9 Block 5SpaceXpreview Falcon 9 Block 5 | Starlink Group 17-39 — launch time, how to watch (20 July 2026)

Le lancement en bref

Rocket	Falcon 9 Block 5
Operator	SpaceX
Pad	Space Launch Complex 4E, Vandenberg SFB, CA, USA
T-0 (UTC)	18 juillet 2026 à 14:00
Status	Go

Starlink Group 17-39 is scheduled to launch on a Falcon 9 Block 5 rocket on 20 July 2026 at 14:00 UTC from Space Launch Complex 4E. Follow it live in 3D on Cosmik and get an alert before liftoff.

Launch at a glance

Rocket: Falcon 9 Block 5
Mission: Starlink Group 17-39
Operator: SpaceX
Launch pad: Space Launch Complex 4E, Vandenberg SFB, CA, USA
Scheduled liftoff: 20 July 2026 at 14:00 UTC
Status: Go

See every upcoming mission on the rocket launch schedule or track thousands of satellites live on the 3D map.

Suivez cette mission en direct en 3D et recevez une alerte gratuite avant le décollage.

Ouvrir la carte live →

Sources

Launch Library 2 · The Space Devs

Prochains lancements

Falcon 9 Block 5 | Starlink Group 17-48 — launch time, how to watch (11 July 2026) — 11 juillet 2026 à 03:00 UTC
Falcon 9 Block 5 | Starlink Group 15-14 — launch time, how to watch (14 July 2026) — 14 juillet 2026 à 01:16 UTC
Falcon 9 Block 5 | Starlink Group 10-45 — launch time, how to watch (14 July 2026) — 14 juillet 2026 à 07:15 UTC