Connect with us
https://tpc.googlesyndication.com/pagead/imgad?id=CICAgKDriYHe3QEQARgBMgh47LykQhqW-w

Space

Sierra Nevada Satisfied with Dream Chaser Glide Test

Space.com

Published

on

Sierra Nevada Corporation’s Dream Chaser test vehicle glides during a Nov. 11 flight that the company said met or exceeded its expectations.

WASHINGTON — Executives with Sierra Nevada Corporation said Nov. 13 they believed the recent glide flight of a Dream Chaser test article was successful and they won’t need to fly that vehicle again.

In a conference call with reporters, company officials said the Nov. 11 flight of the Dream Chaser engineering test article at Edwards Air Force Base went as expected. In that flight, the lifting-body vehicle was released from a helicopter at an altitude of about 3,750 meters and glided to a runway landing 60 seconds later, reaching a top speed of 530 kilometers per hour during its descent.

“We are announcing today a successful atmospheric flight test of Dream Chaser, and it is in our minds a signal that our program has moved another step closer to operations and orbital flight,” said Mark Sirangelo, corporate vice president of Sierra Nevada Corporation’s Space Systems unit.

Analysis of the data collected during that flight is in progress, but Sirangelo felt confident that the vehicle performed as expected. “Overall, our parameters in the test were met or exceeded, in our minds, and we feel very, very positive about this test,” he said.

That will be verified by NASA, as the flight was a milestone in a commercial crew award known as Commercial Crew Integrated Capability that the company received in 2012. If it is, Sirangelo said it’s unlikely this test vehicle will perform a similar flight, and will instead be placed in “flyable storage.”

“We’ll make the decision as we go forward in the coming weeks” about the need for another flight, he said. “If we have all the data that we needed from the test, and if NASA concludes that with us, the vehicle will not need any further flight tests.”

When the company was focused on developing a crewed version of Dream Chaser, there were plans for additional glide flights, at higher speeds and with pilots on board, to simulate abort conditions, said Steve Lindsey, vice president of Space Exploration Systems at Sierra Nevada Corporation.

With the company now developing a cargo version only at this time, those flights are no longer needed. “Should we ever go do crew again, we would add those things back in,” Lindsey said. “That’s why we’re going to keep this vehicle in flyable storage, should that ever occur in the future.”

For now, Sierra Nevada Corporation is working on the cargo version of Dream Chaser to serve a NASA Commercial Resupply Services 2 contract it received in 2016. The first flight of the Dream Chaser under that contract will be in 2020; it will serve as both an orbital test flight of the vehicle as well as a mission to transport cargo to and from the station.

Elements of that first orbital vehicle are already under construction, Sirangelo said, even in advance of a critical design review scheduled for the middle of 2018. The vehicle passed a preliminary design review earlier this year, meaning “there were no showstoppers along the way for us to go fly the vehicle,” he said.

The successful flight test was a relief for those at the company who have spent years working on the vehicle, including an October 2013 glide flight that both the company and NASA considered a success even though a landing gear problem caused it to skid off the runway after landing.

“It was, collectively for us, probably the longest minute of our lives watching it,” Lindsey said. “But it sure was rewarding at the end when it touched down safely.”

This story was provided by SpaceNews, dedicated to covering all aspects of the space industry.

Space.com is the premier source of space exploration, innovation and astronomy news, chronicling (and celebrating) humanity's ongoing expansion across the final frontier. We transport our visitors across the solar system and beyond through accessible, comprehensive coverage of the latest news and discoveries. For us, exploring space is as much about the journey as it is the destination. So from skywatching guides and stunning photos of the night sky to rocket launches and breaking news of robotic probes visiting other planets, at Space.com you’ll find something amazing every day.

Advertisement

Space

'Stargate Origins' Brings Classic Sci-Fi Back Tonight

Space.com

Published

on

Continue Reading

Space

Mars Meteorite Will Return to the Red Planet with NASA Rover

Space.com

Published

on

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.

A close-up of a meteorite that likely came from Mars.

Credit: NASA/JPL-Caltech

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.

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.

Credit: NASA/JPL-Caltech

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.”

Follow Calla Cofield @callacofield. Follow us @Spacedotcom, Facebook and Google+. Original article on Space.com.

Continue Reading

Space

Kepler Space Telescope Discovers 95 More Alien Planets

Space.com

Published

on

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.

Follow Mike Wall on Twitter @michaeldwall and Google+. Follow us @Spacedotcom, Facebook or Google+. Originally published on Space.com.

Continue Reading

Space

Russian Cargo Ship Delivers 3 Tons of Supplies to Space Station

Space.com

Published

on

Continue Reading

Trending