Brits should be able to see a SpaceX rocket soaring across the starry skies tonight.
The Demo-2 mission is scheduled pass over UK skies late Tuesday evening with two astronauts aboard.
A spell of sunny weather and clear skies over much of the south of the UK should create ideal viewing conditions for eager stargazers to see the rocket carrying astronauts pass overheard.
However it will depend on weather across the Atlantic, after concerns yesterday that the mission could be cancelled due to unfavourable conditions.
If all goes to plan, the Falcon 9 rocket will take off from launchpad 39A at the Kennedy Space Centre in Florida and journey to the International Space Station.
The mission is being touted as Elon Musk's biggest project yet, as the SpaceX founder looks to make history with its first-ever human flight.
It would also be the first private space flight to head to the International Space Station, seen as a pivotal step in ambitions for the future for space tourism.
The rocket is set to lift-off at around 4.33pm EDT (9.33pm BST).
If it all goes to plan, it means we could see the rocket flying over the UK 15 minutes later, which will be around 9.45-9.50pm BST, reports the Manchester Evening News.
NASA had warned yesterday there is a chance of cancellation if the weather prevents take-off.
There was a 40% chance that the mission could be cancelled after the US Air Force 45th Weather Squadron predicted a 60% chance of unfavourable weather conditions.
However as night fell over the United States' eastern seaboard, planners were more optimistic.
Mr Musk tweeted a photo of the rocket framed by a stunning sunset the night before the mission.
Weather Squadron officers said the forecast was improving and they maintained hopes it would go ahead.
It will be carrying the Crew Dragon spacecraft with experienced NASA astronauts Robert Behnken, 48, and Douglas Hurley, 53, strapped inside.
Shortly after lift-off, the rocket will separate into what is called a first stage and a second stage.
The first will return to a SpaceX landing ship stationed in the Atlantic Ocean off the coast of Florida, while the second part of the rocket continues the journey with the Crew Dragon.
Once in orbit, the Crew Dragon will then separate from the second stage and dock with the space station 24 hours later.
The pair of astronauts will test the Crew Dragon’s environmental control system, the displays and controls, and the manoeuvring thrusters.
Demo-2 is a demonstration for SpaceX to show their ability to ferry astronauts to the space station and back safely.
It’s the final major step for the firm’s astronaut carrier to get certified by NASA’s Commercial Crew Programme for more long-term manned missions to space.
Where in the UK can you watch the rocket?
Stargazers get the best views of the skies on clear nights away from light pollution.
Heading to the countryside away from city lights will generally offer the best place to watch the skies, as long as the travel does not break UK coronavirus lockdown social distancing rules.
Visibility will strongly depend on weather and other atmospheric conditions in the UK.
But many Brits eager to watch the rocket pass overhead should be in luck tonight.
The Met Office forecast for Tuesday says England and Wales are set to be dry with clear spells.
However it is expected to be cloudy further north with some further rain and drizzle for parts of Scotland.
