Hope spacecraft enters orbit

        United Arab Emirates Hope spacecraft

Addis Ababa, February 10, 2021 (Walta)- The United Arab Emirates is celebrating its first mission at Mars.

It has put a probe called Hope in orbit around the planet, making it only the fifth spacefaring entity to do so after the US, the Soviet Union, Europe, and India.

The spacecraft, which left Earth seven months ago, had to make a braking manoeuvre to be sure of being captured by Mars’ gravity.

UAE scientists can now look forward to studying the planet’s atmosphere.

Their satellite carries three instruments that will observe, among other targets, how neutral atoms of hydrogen and oxygen – remnants from Mars’ once abundant water – leak into space.

In the process, Hope will return spectacular, high-resolution, full-disk images of the planet.

Tuesday marked the most critical phase in the mission.

Hope had been approaching Mars at over 120,000km/h (relative to the Sun) and needed to execute a precise 27-minute burn on its braking engines to scrub some of that speed or risk skipping off into ever deeper space.

The manoeuvre, performed by six thrusters on the probe, commenced at about 19:30 GST (15:30 GMT), with confirmation received at Earth some 11 minutes later – the delay being the time it took for radio signals to traverse the 190-million-km separation between Mars and Earth.

The official announcement on the burn’s completion when it came was calm, and the applause relatively restrained. Perhaps it was the relief speaking after a nerve-shredding wait for the positive telemetry.

“Mars orbit insertion was the most critical and dangerous part of our journey to Mars, exposing the Hope probe to stresses and pressures it has never before faced,” said Omran Sharaf, the Hope mission’s project director at the Mohammed bin Rashid Space Centre

“With this enormous milestone achieved, we are now preparing to transition to our science orbit and commence science data gathering.”

The past few days have witnessed tremendous enthusiasm for Hope and its mission, with public monuments, buildings, and heritage sites across the federation all lit up in red.

Dubai’s Burj Khalifa, the tallest human-made structure on Earth, had been flashing a countdown to Tuesday’s big moment.

Hope is regarded as a triumph for a small gulf nation that dared to think seven years ago that it could inspire the next generation by launching the first Arab interplanetary space mission.

“We wanted to arrive at Mars; (I’m) really grateful, and it’s like a weight of seven years has been lifted from my shoulders,” said Her Excellency Sarah Al Amiri, UAE minister of state for advanced technology and chair of the UAE Space Agency.

“On arriving at Mars. I’m now truly looking forward to the scientific discoveries. And I truly hope this mission will impact an entire generation to strive to do things that are even bigger,” she told BBC News.

Hope is now running in an initial ellipse around Mars that comes as close as 1,000km from the planet and goes out to almost 50,000km. Over the course of the next few weeks, this will be trimmed to a 55-hour, 22,000km-by-43,000km orbit that is inclined to the equator by about 25 degrees.

(Source: BBC)

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