Apollo 17 astronaut Harrison Schmitt, seen here during the first of his three moonwalks in December 1972, has begun to release his diary of the last lunar landing mission 45 years later.
Harrison Schmitt went for a walk on Dec. 11, 1972. Forty-five years later, he is almost ready to share his diary of that day.
The last of the twelve NASA astronauts to step foot onto the surface of the moon — and the only geologist to do so — Schmitt was the lunar module pilot on NASA’s Apollo 17 mission, the sixth, last, and as Schmitt puts it, “most recent human visit to the moon.” Now, on the 45th anniversary of his lunar journey, Schmitt is beginning to take the public on a stroll through history, his memories and the findings that came from exploring Taurus Littrow Valley on the moon.
“This project began 45 years ago,” explains Schmitt. “I am gradually getting to the point where the drafting, I think, is good enough that I can let other people share in what my impressions were during the mission, as well as what the whole operation was about.” [The Apollo Moon Landings: How They Worked (Infographic)]
“Apollo 17: Diary of the Twelfth Man” quietly debuted as a new section of Schmitt’s website in early November when he uploaded the fourth chapter, “30 Days and Counting.” Although the first through third chapters still remain to be published, Schmitt chose the fourth to begin “because the interval between its online publication date and the launch date coincides with the chapter title,” he wrote in a note to accompanying the post.
On Friday (Dec. 7), 45 years to the day after he lifted off with Apollo 17 commander Eugene Cernan and command module pilot Ronald Evans, Schmitt posted the diary’s fifth chapter, “30 Seconds and Counting!” — an almost 49,000 word account of the Saturn V launch that follows Schmitt and his crewmates from the ground to leaving Earth orbit for the moon.
“[Seven and a half] 7.5 million pounds of thrust would lift us slowly at first and then faster and faster toward orbit on a trail of brilliant flame, not visible to us but splitting open the night for everyone below,” recounts Schmitt. “Pulsing waves of sound and searing streams of light buffeted the bodies and minds of onlookers, bringing spontaneous and unexpected hugs, cries and tears.”
The Apollo 17 launch marked the first time NASA had sent astronauts into space at night.
“Once again, a life-tipped pillar of fire, the Saturn rocket, a massive tribute to boldness and imagination, became a blazing symbol of human potential for greatness. Except for reflected light coming through the small window in front of Gene and another in the boost protective cover over the [crew] hatch, I had only a vague sense of the brilliant flame beneath us,” writes Schmitt.
Schmitt pulls from a wide variety of sources for the content of the diary. Amid his own observations, Schmitt cites from NASA air to ground radio transcripts, public affairs reports and the recollections of others. He has also formatted the journal to help readers keep track of the topics at hand.
“A complication to reading diaries is their instantaneous jump from subject to subject. In addition to the liberal use of endnotes, distinguishing between subjects and sources is aided by the consistent use of different font styles and colors in the text,” Schmitt explains in his preface.
Harrison Schmitt is releasing “Apollo 17: Diary of the Twelfth Man” in chapters on his website.
For example, Schmitt turns the text red when discussing anomalies, or problems, during the mission. He uses blue when writing of Earth observations and he uses purple for views about the moon. He reserves turquoise for “probable dialog” between he and his two crewmates, as he can best derive from his memory.
“On the horizon, bands of orange and blue lay below the black of space,” Schmitt writes, describing — in blue text — and captioning a photograph of his first view of Earth from space. “Outside, darkness finally had been broken by a spectacular sunrise that had provided what I described a few minutes later as ‘the biggest rainbow I’d ever seen,’ extending along the entire pre-sunrise horizon.”
“Like childhood’s home, we really see the Earth only as we prepare to leave,” waxes Schmitt.
“It [the diary] is both technical and philosophical, in some aspects,” Schmitt told collectSPACE.
Schmitt, who is now 82, logged a total of 75 hours on the lunar surface, including 22 hours out on three moonwalks. With Cernan’s death in January, Schmitt became the final living member of the Apollo 17 crew (Evans died in 1990).
Although 45 years have already passed for Schmitt to feel ready to prepare and share the diary, he still sees it as a “long-running project” that will not be completed within just the 12-day span of the mission.
“The 45th anniversary seemed like a good time to begin,” he said. “It is going to take a long time still. There is a lot to be said.”
To read “Apollo 17: Diary of the Twelfth Man,” see Harrison Schmitt’s website, americasuncommonsense.com.
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Mars Meteorite Will Return to the Red Planet with NASA Rover
Rohit Bhartia of NASA’s Mars 2020 mission holds a slice of a meteorite scientists have determined came from Mars. This slice will likely be used here on Earth for testing a laser instrument for NASA’s Mars 2020 rover; a separate slice will go to Mars on the rover.
A chunk of rock that was once part of Mars, but landed on Earth as a meteorite, will return to the Red Planet aboard a NASA rover set to launch in 2020.
The meteorite, known as Sayh al Uhaymir 008 (SaU008) was found in Oman in 1999, but geologists determined that it likely originated on Mars, according to a statement from NASA’s Jet Propulsion Laboratory. Scientists think collisions between Mars and other large bodies in the solar system’s early days sent chunks of the Red Planet into space, where they might wander for eons before falling onto Earth’s surface.
Now, NASA scientists are using the meteorite to calibrate an instrument that will fly on the Mars 2020 rover, which is scheduled to drop down on the Red Planet’s surface and collect rock samples that could one day be returned to Earth. One of the rover’s main goals is to evaluate the potential habitability of ancient and present-day Mars. [How NASA’s Mars 2020 Rover Will Work (Infographic)]
The meteorite is being used to calibrate an instrument called the SHERLOC (Scanning Habitable Environments with Raman and Luminescence for Organics and Chemicals), which will use techniques often used in forensic science to identify chemicals in the Martian rock samples, in features as thin as a human hair.
A close-up of a meteorite that likely came from Mars.
The researchers will study the meteorite on Earth, where they are able to make sure their instruments are producing a correct analysis of the rock, and understand what features of the rock are perceptible to their instruments. When the rover settles onto Mars, researchers can once again use the rock to make sure their instruments are working as they should be, before pointing them at features of the Martian surface.
“We’re studying things on such a fine scale that slight misalignments, caused by changes in temperature or even the rover settling into sand, can require us to correct our aim,” said Luther Beegle, principal investigator for SHERLOC, in the statement. “By studying how the instrument sees a fixed target, we can understand how it will see a piece of the Martian surface.”
There are only about 200 confirmed Martian meteorites that have been found on Earth, according to the statement. The SaU008 meteorite comes from London’s Natural History Museum, which lends out hundreds of meteorites (most of them not from Mars) every year for scientific studies. The SHERLOC team needed a Martian meteorite that was robust enough to endure the journey to Mars without flaking or crumbling. (Launch from Earth and entry into the Martian atmosphere are both very strenuous events for everything on board.) The rock also “needed to possess certain chemical features to test SHERLOC’s sensitivity. These had to be reasonably easy to detect repeatedly for the calibration target to be useful,” according to the statement.
A slice of a Martian meteorite undergoes oxygen cleaning to remove organics. This slice will remain on Earth to be used for testing and calibrating instruments.
Usually, instruments like SHERLOC are calibrated with a variety of materials including rock, metal and glass. And Mars meteorites have been used for instrument calibration in the past. In fact, another instrument aboard the Mars 2020 rover, called SuperCam, will be adding a Mars meteorite to NASA’s calibration target, according to the statement. And while this would be the first Mars meteorite to return to the surface of the Red Planet, NASA’s Mars Global Surveyor, which orbits the Red Planet, carries a chunk of a Martian meteorite.
SHERLOC will carry other materials from Earth in addition to Su008, including materials that could be used to make a spacesuit for use on Mars. Observations of how the material withstands the radiation, atmosphere and temperature variations on Mars will provide valuable information for possible crewed trips to the Red Planet.
“The SHERLOC instrument is a valuable opportunity to prepare for human spaceflight as well as to perform fundamental scientific investigations of the Martian surface,” Marc Fries, a SHERLOC co-investigator and curator of extraterrestrial materials at Johnson Space Center, said in the statement. “It gives us a convenient way to test material that will keep future astronauts safe when they get to Mars.”
Kepler Space Telescope Discovers 95 More Alien Planets
Planets around other stars are the rule rather than the exception, and there are likely hundreds of billions of exoplanets in the Milky Way alone. NASA’s Kepler space telescope has found more than 2,400 alien worlds, including a new haul of 95 planets announced on Feb. 15, 2018.
The exoplanet discoveries by NASA’s Kepler space telescope keep rolling in.
Astronomers poring through data gathered during Kepler’s current extended mission, known as K2, have spotted 95 more alien planets, a new study reports.
That brings the K2 tally to 292, and the total haul over Kepler’s entire operational life to nearly 2,440 — about two-thirds of all the alien worlds ever discovered. And more than 2,000 additional Kepler candidates await confirmation by follow-up observations or analysis. [7 Greatest Exoplanet Discoveries by NASA’s Kepler (So Far)]
Kepler launched in March 2009, on a mission to help scientists determine just how common rocky, potentially habitable worlds such as Earth are throughout the Milky Way. For four years, the spacecraft stared continuously at about 150,000 stars, looking for tiny dips in their brightness caused by the passage of planets across their faces.
This work was highly productive, as noted above. But in May 2013, the second of Kepler’s four orientation-maintaining “reaction wheels” failed, and the spacecraft lost its superprecise pointing ability, bringing the original mission to a close.
But mission managers figured out a way to stabilize Kepler using sunlight pressure, and the spacecraft soon embarked on its K2 mission, which involves exoplanet hunting on a more limited basis, as well as observing comets and asteroids in our own solar system, supernovas and a range of other objects and phenomena.
For the new study, researchers analyzed K2 data going all the way back to 2014, zeroing in on 275 “candidate” signals.
“We found that some of the signals were caused by multiple star systems or noise from the spacecraft,” study lead author Andrew Mayo, a Ph.D. student at the Technical University of Denmark’s National Space Institute, said in a statement. “But we also detected planets that range from sub-Earth-sized to the size of Jupiter and larger.”
Indeed, 149 of the signals turned out to be caused by bona fide exoplanets, 95 of which are new discoveries. And one of the new ones is a record setter.
“We validated a planet on a 10-day orbit around a star called HD 212657, which is now the brightest star found by either the Kepler or K2 missions to host a validated planet,” Mayo said. “Planets around bright stars are important because astronomers can learn a lot about them from ground-based observatories.”
The new study was published today (Feb. 15) in The Astronomical Journal.
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