Showing posts with label Space. Show all posts
Showing posts with label Space. Show all posts
Saturday
50 years ago, humanity’s first steps on another world
WASHINGTON — Fifty years ago on Saturday, American astronauts Neil Armstrong and Buzz Aldrin became the first humans in history to set foot on the moon, an event watched on television by half a billion people.
Their lunar module, named “Eagle,” touched down at 2018 GMT (4:18pm ET) on July 20, 1969.
A little over six hours later, at 0256 GMT, Armstrong placed his left foot on the lunar surface, declaring: “That’s one small step for man, one giant leap for mankind.”
NASA has been in overdrive for several weeks to mark the anniversary, with exhibits and events nationwide but most notably at the Kennedy Space Center in Cape Canaveral, Florida and the Johnson Space Center in Houston, Texas.
On Saturday, Vice President Mike Pence is due to deliver a speech from the Kennedy Space Center, from where Armstrong, Aldrin and Michael Collins, the third crew member took off. All three men were born in 1930.
Pence sent shockwaves through the industry in his last major space speech in March, when he advanced the deadline to return humans to the moon by four years, from 2028 to 2024.
It is within this charged context, with President Donald Trump publicly questioning NASA’s plans to return to the moon to test technology for Mars, that the U.S. is celebrating the anniversary of the epoch-making Apollo 11 mission.
‘World in my window’
Collins, 88, has remained the more active of the surviving Apollo veterans, and frequently shares lyrical recollections of the mission.
Speaking at a Washington event on Thursday, he said that while the Moon itself was breathtaking seen up close, it was the view of Earth that has stayed with him and shaped his perspective.
“When we rolled out and looked at (the Moon), oh, it was an awesome sphere,” he said.
“The sun was behind it, so it was illuminated by a rim of gold which made the strangest appearances of the craters and crater pits, the contrast between the whiter than white and darker than dark.”
As magnificent as that view was, it was “nothing compared to this other window out there,” Collins continued.
“Out there was this little pea about the size of your thumbnail at arm’s length: blue, white, very shiny, you get the blue of the oceans, white of the clouds, streaks of rust we call continents, such a beautiful gorgeous tiny thing, nestled into this black velvet of the rest of the universe.”
While Neil Armstrong and Buzz Aldrin were on the surface, ex-fighter pilot Collins remained in lunar orbit where he was in touch with ground control, providing them updates on his position.
“I said to Mission control, ‘Hey, Houston, I’ve got the world in my window.’
Cold War victory
By placing men on the moon, the U.S. achieved the ultimate victory in the space race after losing the initial heats to the Soviet Union, which was first to put a satellite and then a man in space.
The undertaking, announced by president John F. Kennedy in 1961 and partly spurred by the Bay of Pigs crisis, involved enormous spending rivaled in scope only by the construction of the Panama Canal and the Manhattan Project.
It was a resounding achievement not just from a technical perspective but also diplomatic, as the two superpowers jostled for global prestige in the Cold War.
Trump has relaunched the race to re-conquer the moon — this time with the first woman — and to journey onwards to the Red Planet.
But the deadlines — 2024 and 2033 respectively — appear unrealistic and have caused turbulence within the space agency. /muf
source: technology.inquirer.net
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NASA plans to send mini-helicopter to Mars
The US space agency said Friday it plans to launch the first-ever helicopter to Mars in 2020, a miniature, unmanned drone-like chopper that could boost our understanding of the Red Planet.
Known simply as “The Mars Helicopter,” the device weighs less than four pounds (1.8 kilograms), and its main body section, or fuselage, is about the size of a softball.
It will be attached to the belly pan of the Mars 2020 rover, a wheeled robot that aims to determine the habitability of the Martian environment, search for signs of ancient life, and assess natural resources and hazards for future human explorers.
Mars 2020 is planned for launch in July 2020 with an arrival on the surface of Mars expected in February 2021.
“NASA has a proud history of firsts,” said NASA Administrator Jim Bridenstine in a statement.
“The idea of a helicopter flying the skies of another planet is thrilling.”
No nation has ever flown an helicopter on Mars before.
Thin atmosphere
The undertaking began in August 2013 as a technology development project at NASA’s Jet Propulsion Laboratory.
In order to fly in Mars’ thin atmosphere, the space helicopter has to be super light, yet as powerful as possible.
“The altitude record for a helicopter flying here on Earth is about 40,000 feet (12,100 meters),” said Mimi Aung, Mars Helicopter project manager at NASA’s Jet Propulsion Laboratory.
“The atmosphere of Mars is only one percent that of Earth, so when our helicopter is on the Martian surface, it’s already at the Earth equivalent of 100,000 feet up (30,500 meters),” she added.
Engineers built the copter’s twin, counter-rotating blades to “bite into the thin Martian atmosphere at almost 3,000 rpm — about 10 times the rate of a helicopter on Earth,” said a NASA statement.
The helicopter is equipped with “solar cells to charge its lithium-ion batteries, and a heating mechanism to keep it warm through the cold Martian nights.”
Controllers on Earth will command the Mars Helicopter, which was designed to receive and interpret commands from the ground.
Plans are being laid for a 30-day flight test, with five flights going incrementally further each time, up to a few hundred yards (meters).
Its first flight calls for a brief vertical climb of 10 feet (three meters), followed by hovering for a half minute.
NASA views the copter as a “high-risk, high-reward technology demonstration,” it said.
If successful, it could be a model for scouting on future Mars missions, able to access places the human-built rovers cannot reach.
If it fails, it will not impact the Mars 2020 mission.
“The ability to see clearly what lies beyond the next hill is crucial for future explorers,” said NASA’s Thomas Zurbuchen, associate administrator for the science mission directorate.
“We already have great views of Mars from the surface as well as from orbit. With the added dimension of a bird’s-eye view from a ‘marscopter,’ we can only imagine what future missions will achieve.”
source: technology.inquirer.net
Tuesday
NASA scientists answer questions about alien life and water on Mars
To mark the discovery of liquid water on Mars, scientists from the National Aeronautics and Space Administration (NASA) held an Ask Me Anything (AMA) session on reddit where they answered questions from the public.
Just a leaky faucet's worth of water
Just how much water are we talking about here? According to the scientists, it’s just a small amount—comparable to the amount that drips from your faucet if you don’t close it tightly. “We think this is a very small amount of water—maybe just enough to wet the top layer of the surface of Mars,” they said. “Think of this as a ‘seep’ not a flow.”
At present, NASA’s rovers can’t approach the regions where they suspect water is present because they’re considered “special regions.” To enter the area, extra precautions are required to prevent contamination by Earth life.
Preventing contamination by Earth life
Scientists are keenly aware of the possibility of microscopic alien life, and are very careful to make sure that Earth life doesn't contaminate and overrun the potentially fragile Martian ecosystem.
For one thing, rovers need additional sterilization before they can come closer. Scientists also take samples of microbes on the spacecraft before launch for comparison with any future discoveries.
Other Mars-related projects NASA has in mind are InSight in 2016—a lander designed to detect Mars-quakes—and a rover in 2020.
The AMA took place from 2-3 p.m. ET (2-3 a.m. Tuesday in the Philippines). Scientists who participated were Rich Zurek, Chief Scientist of NASA’s Mars Program Office and Project Scientist at the Mars Reconnaissance Orbiter project; Leslie K. Tamppari, Deputy Project Scientist, MRO; Stephanie L. Smith, NASA-JPL social media team; and Sasha E. Samonchina, NASA-JPL social media team. — TJD, GMA News
source: gmanetwork.com
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