Washington, Feb. 28 -- NASA's new administrator Jared Isaacman has unveiled a massive overhaul of its Artemis programme, acknowledging that the agency's previous plan to land astronauts on the Moon in 2028 was not realistic without preparing an additional preparatory step.

Under the revised approach, NASA will announce on a new mission in 2027 focused on testing commercially developed lunar landers in low-Earth orbit before committing astronauts to a surface landing.

As per the programme, instead of attempting a complex leap from a lunar fly-by to a touchdown, NASA will instead move in stages, aiming to reduce technical risk and rebuild operational momentum.

That flight will be followed in turn, by at least one and possibly two lunar lan...