Space-loving Scots will be hoping to get a glimpse of the SpaceX rocket tonight in NASA's second attempt to make history.
After Wednesday's much-anticipated launch was cancelled at the last minute due to bad weather, it is hoped astronauts Robert Behnken and Douglas Hurley will become the first humans to be propelled into space since 2011 this evening.
SpaceX, which is billionaire Elon Musk’s company, have teamed up with Nasa to launch a spacecraft from US soil - which will be the first for a private firm.
The Demo-2 mission will take off from the Kennedy Space Centre in Florida and journey to the International Space Centre.
The rocket will be visible from the UK around 15 minutes after take off, so long as the skies are clear of cloud or fog.
Speaking on Wednesday night, Jim Bridenstine, NASA administrator, said: “I know there’s a lot of disappointment today. The weather got us.
“There was a concern that if we did launch, it could actually trigger lightning.”
Here's everything you need to know about this evening's launch, including when the rocket is due to be seen from the UK.
What time is the launch?
The launch is scheduled for 15:22 EDT (20:22 BST) from the historic Launch Complex 39A at NASA’s Kennedy Space Centre in Florida.
How can you watch the launch from the UK?
NASA will be live-streaming tonight’s launch on its YouTube channel here.
How long will it take the astronauts to reach the International Space Station?
While the ISS is just 400km away from Earth, it will take several hours for the astronauts to get there, due to the station’s orbit.
The Falcon 9 rocket is scheduled to dock at the space station at 10:29 EDT (15:29 BST) on Sunday May 31.
This means that the astronauts will take around 19 hours to reach the ISS.
How is the weather looking for the launch?
Unfortunately, the weather isn’t looking great for tonight’s launch.
NASA said: “The U.S. Air Force 45th Weather Squadron predicts a 40% chance of favourable weather conditions for NASA’s SpaceX Demo-2 launch.
“The primary weather concerns for launch are flight through precipitation, anvil and cumulus clouds.”
What happens if the launch is cancelled again?
If tonight’s launch is cancelled again due to bad weather, NASA and SpaceX will attempt a third launch tomorrow.
Will you be able to see the rocket from the UK?
Experts say that there’s a high chance the Falcon 9 rocket will be visible from the UK after launching from Florida.
Virtual Astro explained: “We may be able to see Dragon after launch on Saturday. Not 15 minutes after launch, but on subsequent orbits that evening.
Virtual Astro says that's it's likely the rocket will be visible from the UK around an hour after launch.
Replying to one user on Twitter, he said: "It will but an hour or so after launch.”
What is the purpose of the mission?
NASA explained: “This will be SpaceX’s final test flight for NASA’s Commercial Crew Program and will provide critical data on the performance of the Falcon 9 rocket, Crew Dragon spacecraft, and ground systems, as well as in-orbit, docking, and landing operations.
“The test flight also will provide valuable data toward certification of SpaceX’s crew transportation system for regular flights carrying astronauts to and from the space station.
“SpaceX currently is readying the hardware for the first space station crew rotational mission, which would happen after data from this test flight is reviewed for certification.”