Launch attempt one was scrubbed due to bad weather at the launch site.
Attempt two was scrubbed due to strong currents and severe weather in the recovery area. That was a novel reason for a scrub.
Attempt three was scrubbed because of weather at the launch site.
The 4th cancellation was due to faulty sensor readings.
EDIT: 5th attempt cancelled due to range weather violations.
MikeOnSpace talking about SpaceX's Starlink v Amazon's Kuiper: Amazon KUIPER vs SpaceX STARLINK - Another heavyweight enters the race for Global Satellite Internet
SpaceX Starlink 12
SpaceX is launching 60 additional Satellites for their own Starlink Constellation.
The booster is a Block 5 on its third flight and will land on a drone ship.
The mission to low earth orbit will launch from LC 39A at Kennedy Space Center.
SpaceX will attempt to capture the fairings.
Cargo:
- Payload mass is approximately 18,5 tonnes
- 60 Starlink Satellites
Check your local time of launch at: www.timeanddate.com
Where to watch:
15 minutes before launch:
Background information about previous SpaceX launches: Wikipedia
Why SpaceX is Making Starlink - Real Engineering: Youtube
MikeOnSpace: OFFICIAL Starlink SPEED TEST results and SPACE LASERS - details on the Private Beta and Public Beta
Mark Handley: Using ground relays with Starlink
Useful links to stay up to date on launches:
Spaceflightnow.com: Launch Schedule
Everyday Astronaut: Prelaunch Previews
Space News:
NASA Spaceflight nasaspacefight.com
TMRO: YouTube
Be aware, this is rocket surgery.
Small disturbances can lead to postponed launches. Making sure everything is just right is way cheaper than risking big fireworks.