Nasa captures sound of chopper blades on Mars
First came the amazing pictures, then the video. Now Nasa is sharing sounds of its little helicopter humming through the thin Martian air.
Nasa’s Jet Propulsion Laboratory in California released this first-ever audio on Friday, just before Ingenuity made its fifth test flight, a short one-way trip to a new airfield.
During the fourth flight a week earlier, the low hum from the helicopter blades spinning at more than 2,500 revolutions per minute is barely audible. It almost sounds like a low-pitched, faraway mosquito or other flying insect.
That’s because the 1.8-kg helicopter was more than 80 metres from the microphone on the Perseverance rover. The rumbling wind gusts also obscured the chopper’s sound. Scientists isolated the sound of the whirring blades and magnified it, making it easier to hear.
“This is a very good surprise,” said David Mimoun, a professor of planetary science at Institut Superieur de l’Aeronautique et de l’Espace in Toulouse, France, and science lead for the SuperCam Mars microphone on board Perseverance. “We had carried out tests that told us the microphone would barely pick up the sounds,” he added.
Ingenuity, the first powered aircraft to fly at another planet, arrived at Mars on February 18, clinging to Perseverance’s belly. Its first flight was April 19. After proving itself more robust, it will now embark on a new mission: to scout ahead of Perseverance to assist in its hunt for ancient life.
Much like with Covid-19, the monkeypox health crisis in the US is hitting Black and Hispanic Americans hard. Yet those groups are so far lagging in vaccination rates, early data obtained by Bloomberg News show. In some major US cities with outbreaks, White people are getting the majority of vaccinations, data collected by Bloomberg show. In Chicago, 55% of vaccines have gone to White people. In Washington, D.C., 63.5% of vaccine recipients identify as White.
A prominent Taliban cleric, Sheikh Rahimullah Haqqani, was killed in an attack in a seminary in Kabul when the attacker detonated explosives hidden in a plastic artificial leg on Thursday, according to officials and Taliban sources. It was not immediately clear who was behind the blast. Four Taliban sources told Reuters the attacker was someone who had previously lost his leg and had hidden the explosives in a plastic artificial leg.
China on Thursday said it needs more time to “assess” the India-US proposal to list Pakistan-based Jaish-e-Mohammed (JeM) leader Abdul Rauf Azhar as a global terrorist at the UN Security Council, hours after blocking the joint effort. Chinese foreign ministry spokesperson Wang Wenbin said the 1267 Committee of the UN Security Council has clear provisions about designating terrorist organisations and officials. China had similarly sought time to assess the case.
China has agreed to finance a feasibility study for a cross-border railway with Nepal under the trans-Himalayan multi-dimensional connectivity network, part of the Belt and Road Initiative and pledged $118 million for China-assisted projects in the country, the foreign ministries of the two countries have said. Chinese state councillor and foreign minister, Wang Yi said China will work with Nepal on power projects and also in building cross Himalayan connectivity projects.
Former Sri Lankan President Gotabaya Rajapaksa left Singapore Thursday, the city-state's immigration office said, after his social visit pass expired. "The Immigration & Checkpoints Authority confirms that Mr Gotabaya Rajapaksa left Singapore on 11 August 2022," the office said in reply to an AFP query. Rajapaksa fled to the Maldives on July 13 and then to Singapore, where he announced his resignation after months of protests over Sri Lanka's economic meltdown.