Testing Inflatable Heat Shields For Spacecraft

At Hangar, Raptors Find Shelter from the Storm

As Tropical Storm Hermine charged up the East Coast Sept. 2, 2016, Langley Air Force Base reached out to the Research Services Directorate and NASA Langley Research Center hangar manager Dale Bowser to see if NASA Langley could store a few F-22 Raptors. Even though the hangar in Hampton, Virginia, already had a large visitor — a C-130 from the Wallops Flight Facility on Virginia’s Eastern Shore — the hangar was able to carefully sandwich in more than a dozen Air Force fighters and offer them protection from the wind. NASA Langley photographer David C. Bowman captured the image using a fish-eye lens and shooting down from the hangar's catwalk some 70 feet above the building's floor.

The hangar provides 85,200 square feet (7,915 square meters) of open space and large door dimensions that allow for entry of big aircraft such as Boeing 757s and other commercial or military transport-class planes. The hangar normally is home to 13 of NASA Langley's own research aircraft, when they are not out doing atmospheric science or aeronautics research. Still, there is enough space to share with neighboring Langley Air Force Base during emergencies. The facility is rated for at least a Category 2 hurricane. Built in the early 1950s, it was designed to fit a B-36. It can also accommodate the Super Guppy, which visited NASA Langley in 2014. 

Image credit: NASA/David C. Bowman

Hubble Finds a Lenticular Galaxy Standing Out in the Crowd

A lone source shines out brightly from the dark expanse of deep space, glowing softly against a picturesque backdrop of distant stars and colorful galaxies.

Captured by the NASA/ESA Hubble Space Telescope’s Advanced Camera for Surveys (ACS), this scene shows PGC 83677, a lenticular galaxy — a galaxy type that sits between the more familiar elliptical and spiral varieties.

It reveals both the relatively calm outskirts and intriguing core of PGC 83677. Here, studies have uncovered signs of a monstrous black hole that is spewing out high-energy X-rays and ultraviolet light.

Text Credit: ESA (European Space Agency)

This is where they 3D print cool pieces that are needed for the ISS! They use cool carbon fiber materials to make the final product look smooth and flawless. They are also 3D printing that payload attachment fitting for the SLS Block 1B rocket!! I took a video of it actually printing so be on the lookout for that!

Orion was making waves at @nasalangley this week

Travel Posters of Fantastic Excursions

What would the future look like if people were regularly visiting to other planets and moons? These travel posters give a glimpse into that imaginative future. Take a look and choose your destination:

The Grand Tour

Our Voyager mission took advantage of a once-every-175-year alignment of the outer planets for a grand tour of the solar system. The twin spacecraft revealed details about Jupiter, Saturn, Uranus and Neptune – using each planet’s gravity to send them on to the next destination.

Mars

Our Mars Exploration Program seeks to understand whether Mars was, is, or can be a habitable world. This poster imagines a future day when we have achieved our vision of human exploration of the Red Planet and takes a nostalgic look back at the great imagined milestones of Mars exploration that will someday be celebrated as “historic sites.”

Earth

There’s no place like home. Warm, wet and with an atmosphere that’s just right, Earth is the only place we know of with life – and lots of it. Our Earth science missions monitor our home planet and how it’s changing so it can continue to provide a safe haven as we reach deeper into the cosmos.

Venus

The rare science opportunity of planetary transits has long inspired bold voyages to exotic vantage points – journeys such as James Cook’s trek to the South Pacific to watch Venus and Mercury cross the face of the sun in 1769. Spacecraft now allow us the luxury to study these cosmic crossings at times of our choosing from unique locales across our solar system.

Ceres

Ceres is the closest dwarf planet to the sun. It is the largest object in the main asteroid belt between Mars and Jupiter, with an equatorial diameter of about 965 kilometers. After being studied with telescopes for more than two centuries, Ceres became the first dwarf planet to be explored by a spacecraft, when our Dawn probe arrived in orbit in March 2015. Dawn’s ongoing detailed observations are revealing intriguing insights into the nature of this mysterious world of ice and rock.

Jupiter

The Jovian cloudscape boasts the most spectacular light show in the solar system, with northern and southern lights to dazzle even the most jaded space traveler. Jupiter’s auroras are hundreds of times more powerful than Earth’s, and they form a glowing ring around each pole that’s bigger than our home planet. 

Enceladus

The discovery of Enceladus’ icy jets and their role in creating Saturn’s E-ring is one of the top findings of the Cassini mission to Saturn. Further Cassini discoveries revealed strong evidence of a global ocean and the first signs of potential hydrothermal activity beyond Earth – making this tiny Saturnian moon one of the leading locations in the search for possible life beyond Earth.

Titan

Frigid and alien, yet similar to our own planet billions of years ago, Saturn’s largest moon, Titan has a thick atmosphere, organic-rich chemistry and surface shaped by rivers and lakes of liquid ethane and methane. Our Cassini orbiter was designed to peer through Titan’s perpetual haze and unravel the mysteries of this planet-like moon.

Europa

Astonishing geology and the potential to host the conditions for simple life making Jupiter’s moon Europa a fascinating destination for future exploration. Beneath its icy surface, Europa is believed to conceal a global ocean of salty liquid water twice the volume of Earth’s oceans. Tugging and flexing from Jupiter’s gravity generates enough heat to keep the ocean from freezing.

You can download free poster size images of these thumbnails here: http://www.jpl.nasa.gov/visions-of-the-future/

Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com

SAGE III Science Data Validation Efforts Begin

From its perch on the International Space Station, SAGE III is measuring stratospheric ozone as well as other gases and aerosols.

An orbiting science instrument whose legacy dates back 34 years continues to beam back data on Earth’s protective ozone layer – this time, from a perch on the hull of the International Space Station.

The Stratospheric Aerosol and Gas Experiment III (SAGE III), a NASA Langley Research Center-led mission, was launched on Feb. 19, 2017 and installed on the International Space Station during a 10-day robotic operation.

Since March 2017, the instrument has been measuring and collecting data on Earth’s sunscreen, stratospheric ozone, as well as other gases and aerosols, which are tiny particles in the atmosphere at all altitudes.

The SAGE III instrument makes these measurements through occultation, which involves looking at the light from the Sun or the Moon as it passes through Earth’s atmosphere at the edge, or limb, of the planet. The initial set of atmospheric data collected from the SAGE III instrument was released publicly in October 2017, and the first lunar data was released in January 2018.

Because the SAGE III instrument makes measurements through remote sensing - collecting data from some distance away - the science validation team cannot be sure if the data they are receiving is accurate without first validating it.

To do that, SAGE III science data must be compared to in-situ measurements, or measurements made by other instruments or systems that come in direct contact with the ozone, aerosol, or gas data being collected. These in-situ measurements are collected by the Network for Detection of Atmospheric Composition Change (NDACC), an international group, part of the National Oceanic and Atmospheric Administration, composed of research sites across the world collecting data on the Earth’s atmosphere.

“These sites have been vetted, validated, and have a long statistical history of making science measurements with their instruments,” said SAGE III Science Manager Marilee Roell.

The NDACC will collect these validated measurements through various methods, with two primary methods being through lidar - light detection and ranging - and sondes. Lidar is a ground-based measurement technique that uses a laser to shoot a beam into the Earth’s atmosphere, causing light to scatter by the atmospheric gases and particles. Being able to detect the distance to these gases and particles, the lidar can gather data on the Earth’s atmospheric composition.

Sondes are lightweight, balloon-borne instruments that are flown thousands of feet into the Earth’s atmosphere. As the instrument ascends, it transmits measurements of particle and gas concentrations by radio to a ground-based receiving station. Sondes are used daily across the globe to capture meteorological data, allowing people to check weather conditions each morning.

The science validation team is using NDACC ozone and aerosol lidar data, as well as ozone and water vapor sonde measurements, to validate science data collected from SAGE III.

“We want to match our vertical science product to an externally validated source. It helps the science community have confidence in our data set,” said Roell.

The team is working towards having an externally validated aerosol sonde to compare to the collected SAGE III data. This effort is in the preliminary stages of validating the aerosol balloon sonde against a suite of aerosol sounders, including lidar.

The team is working to validate science data with NDACC locations in Boulder, Colorado and Lauder, New Zealand, which fall within similar latitude bands in the northern and southern hemispheres. To be precise in validation efforts, the lidar or sonde measurement is taken at the same time and location that SAGE III is passing over and collecting equivalent data.

One of the most recent validation efforts took place in Table Mountain, California, and Haute Provence in France. Both locations include validated lidar systems, with lidar being operated by NASA’s Jet Propulsion Laboratory in Table Mountain, California.

Validation efforts were taken a step further by including a third source of measurements: NASA’s DC-8 aircraft. The aircraft, based out of NASA Armstrong Flight Research Center in Palmdale, California, operates as a flying science laboratory. It helps validate the accuracy of other remote-sensing satellite data, such as SAGE III, and can fly under the satellite’s path to collect the same measurements.

Validating the science data using this method required SAGE III, the NASA DC-8 aircraft, and the lidar system in California or France to be taking measurements at the same time and location. The science validation team worked to have all three systems line up while taking measurements and collected some coinciding science data.

NASA also created a validation website for other NDACC sites to use. The site displays SAGE III overpasses of NDACC sites that are three weeks out or less. These sites can choose to make lidar or sonde measurements at the same time as the instrument overpass, and compare them to SAGE III data collected to see if the two sets coincide. The validation team is pursuing additional NDACC sites to coordinate overpass timeframes when the sites may be taking lidar and sonde measurements.

The SAGE III team will present initial science validation data at the European Geosciences Union conference in Vienna, Austria this April.

SAGE III is the latest in a legacy of Langley instruments that go back to the Stratospheric Aerosol Measurement (SAM), which flew on the 1975 Apollo-Soyuz mission. SAGE II, operational from 1984 to 2005, measured global declines in stratospheric ozone that were later shown to be caused by human-induced increases in atmospheric chlorine. Data from it and other sources led to the development of the Montreal Protocol on Substances that Deplete the Ozone Layer.

After the passage of the protocol, SAGE II data also provided key evidence that the ozone layer was showing signs of recovery.

SAGE III, which launched to the station Feb. 19 from Kennedy Space Center in Florida, will continue to monitor that recovery, but with more of Earth’s atmosphere in its sights. SAGE II monitored only the stratosphere. SAGE III is monitoring both the stratosphere and the mesosphere, which is the layer directly above the stratosphere.

Ozone in the upper atmosphere acts as Earth’s sunscreen, protecting the surface from cancer-causing, crop-damaging ultraviolet rays. Atmospheric aerosols contribute to variability in the climate record.

Allison Leybold NASA Langley Research Center

The NASA Aeronautics team is working to transform aviation by enabling a new commercial market for supersonic travel over land. The centerpiece of this effort is the X-59 QueSST (short for Quiet SuperSonic Technology), a new X-plane designed to produce sonic "thumps" that could open the door to new certification standards for commercial supersonic service. NASA and Lockheed Martin are working together to design and build the X-59. Beginning in 2023, NASA will use this X-plane to measure public response to sonic thumps. 

More at www.nasa.gov/lowboom

Science At NASA

ScienceCasts: Horn-rims and Funny Stockings on the Space Station

About three quarters of ISS astronauts experience changes in the structure and function of their eyes.  An experiment on the space station called the “Fluid Shifts Study” is investigating these vision problems in space.

Visit http://science.nasa.gov/ for more.

http://www.nasa.gov/station

Museum Exhibit Reveals the NASA Langley Human Computers from "Hidden Figures"

Sam McDonald NASA Langley Research Center

A new display at the Hampton History Museum offers another view of African-American women whose mathematical skills helped the nation’s early space program soar.

“When the Computer Wore a Skirt: NASA’s Human Computers” opens to the public Saturday, Jan. 21, and focuses on three women — Dorothy Vaughan, Mary Jackson and Katherine Johnson — who were illuminated in Margot Lee Shetterly’s book “Hidden Figures” and the major motion picture of the same name. Located in the museum's 20th century gallery, it was created with support from the Hampton Convention and Visitor Bureau and assistance from NASA's Langley Research Center.

“Langley’s West Computers were helping America dominate aeronautics, space research, and computer technology, carving out a place for themselves as female mathematicians who were also black, black mathematicians who were also female,” Shetterly wrote.

The modestly sized exhibit is comprised of four panels with photos and text along with one display case containing artifacts, including a 1957 model Friden mechanical calculator. That piece of equipment represented state-of-the-art technology when then original human computers were crunching numbers. A three-minute video profiling Johnson —a Presidential Medal of Freedom winner — is also part of the exhibit.

A display case at left contains a 1957 Friden STW-10 mechanical calculator, the type used by NASA human computers including Katherine Johnson. "If you were doing complicated computations during that time, this is what you used," said Hampton History Museum Curator Allen Hoilman. The machine weighs 40 pounds.

Credits: NASA/David C. Bowman

Museum curator Allen Hoilman said his favorite artifact is a May 5, 1958 memo from Associate Director Floyd Thompson dissolving the West Area Computers Unit and reassigning its staff members to other jobs around the center.

“It meant that the segregated work environment was coming to an end,” Hoilman said. “That’s why this is a significant document. It’s one of the bookends.”

That document, along with several others, was loaned to the museum by Ann Vaughan Hammond, daughter of Dorothy Vaughan. Hoilman said family members of other human computers have been contacted about contributing artifacts as well.

Ann Vaughan Hammond worked hard to find meaningful items for the display. “She really had to do some digging through the family papers,” Hoilman said, explaining that the women who worked as human computers were typically humble about their contributions. They didn’t save many mementos.

“They never would have guessed they would be movie stars,” Hoilman said.

For more information on Katherine Johnson, click here.

Credits:

Sam McDonald NASA Langley Research Center

Pluto ‘Paints’ its Largest Moon Red

In June 2015, when the cameras on NASA’s approaching New Horizons spacecraft first spotted the large reddish polar region on Pluto’s largest moon, Charon, mission scientists knew two things: they’d never seen anything like it elsewhere in our solar system, and they couldn’t wait to get the story behind it.

Over the past year, after analyzing the images and other data that New Horizons has sent back from its historic July 2015 flight through the Pluto system, the scientists think they’ve solved the mystery. As they detail this week in the international scientific journal Nature, Charon’s polar coloring comes from Pluto itself – as methane gas that escapes from Pluto’s atmosphere and becomes “trapped” by the moon’s gravity and freezes to the cold, icy surface at Charon’s pole. This is followed by chemical processing by ultraviolet light from the sun that transforms the methane into heavier hydrocarbons and eventually into reddish organic materials called tholins.

"Who would have thought that Pluto is a graffiti artist, spray-painting its companion with a reddish stain that covers an area the size of New Mexico?" asked Will Grundy, a New Horizons co-investigator from Lowell Observatory in Flagstaff, Arizona, and lead author of the paper. "Every time we explore, we find surprises. Nature is amazingly inventive in using the basic laws of physics and chemistry to create spectacular landscapes."

The team combined analyses from detailed Charon images obtained by New Horizons with computer models of how ice evolves on Charon’s poles. Mission scientists had previously speculated that methane from Pluto’s atmosphere was trapped in Charon’s north pole and slowly converted into the reddish material, but had no models to support that theory.

The New Horizons team dug into the data to determine whether conditions on the Texas-sized moon (with a diameter of 753 miles or 1,212 kilometers) could allow the capture and processing of methane gas. The models using Pluto and Charon’s 248-year orbit around the sun show some extreme weather at Charon’s poles, where 100 years of continuous sunlight alternate with another century of continuous darkness. Surface temperatures during these long winters dip to -430 Fahrenheit (-257 Celsius), cold enough to freeze methane gas into a solid.

“The methane molecules bounce around on Charon's surface until they either escape back into space or land on the cold pole, where they freeze solid, forming a thin coating of methane ice that lasts until sunlight comes back in the spring,” Grundy said. But while the methane ice quickly sublimates away, the heavier hydrocarbons created from it remain on the surface.

The models also suggested that in Charon’s springtime the returning sunlight triggers conversion of the frozen methane back into gas. But while the methane ice quickly sublimates away, the heavier hydrocarbons created from this evaporative process remain on the surface.

Sunlight further irradiates those leftovers into reddish material – called tholins – that has slowly accumulated on Charon’s poles over millions of years. New Horizons’ observations of Charon’s other pole, currently in winter darkness – and seen by New Horizons only by light reflecting from Pluto, or “Pluto-shine” – confirmed that the same activity was occurring at both poles.

“This study solves one of the greatest mysteries we found on Charon, Pluto’s giant moon,” said Alan Stern, New Horizons principal investigator from the Southwest Research Institute, and a study co-author. “And it opens up the possibility that other small planets in the Kuiper Belt with moons may create similar, or even more extensive ‘atmospheric transfer’ features on their moons.”

Credits: NASA/JHUAPL/SwRI