Business Standard

Nasa capsule’s last big step before lunar orbit

- Cape Canaveral (US), 21 November

Nasa’s Orion capsule reached the moon on Monday, whipping around the far side and buzzing the lunar surface on its way to a record-breaking orbit with test dummies sitting in for astronauts. It’s the first time a capsule has visited the moon since Nasa’s Apollo programme 50 years ago, and represents a huge milestone in the $4.1-billion test flight that began last Wednesday.

The close approach of 81 miles (130 km) occurred as the crew capsule and its three wired-up dummies were on the far side of the moon. Because of a half-hour communicat­ion blackout, flight controller­s in Houston did not know if the critical engine firing went well until the capsule emerged from behind the moon, 232,000 miles (370,000 km) from Earth.

The capsule’s cameras sent back a picture of the world — a tiny blue orb surrounded by blackness. “Our pale blue dot and its 8 billion human inhabitant­s now coming into view,” said Mission Control commentato­r Sandra Jones.

The capsule accelerate­d well beyond 5,000 mph (8,000 kph) as it regained radio contact, Nasa said. Less than an hour later, Orion soared above Tranquilit­y Base, where Neil Armstrong and Buzz Aldrin landed on July 20, 1969.

“This is one of those days that you’ve been thinking about and talking about for a long, long time,” flight director Zeb Scoville said.

Earlier in the morning, the moon loomed ever larger in the video beamed back, as the capsule closed the final few thousand miles since blasting off from Florida’s Kennedy Space Centre, atop the most powerful rocket ever built by Nasa.

Orion needed to slingshot around the moon to pick up enough speed to enter the sweeping, lopsided lunar orbit. Flight controller­s evaluated the data pouring back, to check if the engine firing went as planned. Another firing will place the capsule in that elongated orbit on Friday. The coming weekend, Orion will shatter Nasa’s distance record for a spacecraft designed for astronauts — nearly 250,000 miles (400,000 km) from Earth, set by Apollo 13 in 1970. And it will keep going, reaching a maximum distance from Earth next Monday at nearly 270,000 miles (433,000 km).

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