Moffett Field, CA – New observations show that Ceres, the largest body in the asteroid belt, does not appear to have the carbon-rich surface composition that space- and ground-based telescopes previously indicated.
Using data primarily from NASA’s Stratospheric Observatory for Infrared Astronomy, SOFIA, a team of astronomers has detected the presence of substantial amounts of material on the surface of Ceres that appear to be fragments of other asteroids containing mostly rocky silicates.
Written by Bob Jacobs / Allard Beutel
Washington, D.C. – In 2016, NASA drove advances in technology, science, aeronautics and space exploration that enhanced the world’s knowledge, innovation, and stewardship of Earth.
“This past year marked record-breaking progress in our exploration objectives,” said NASA Administrator Charles Bolden. “We advanced the capabilities we’ll need to travel farther into the solar system while increasing observations of our home and the universe, learning more about how to continuously live and work in space, and, of course, inspiring the next generation of leaders to take up our Journey to Mars and make their own discoveries.”
Written by Elizabeth Landau
Pasadena, CA – At first glance, Ceres, the largest body in the main asteroid belt, may not look icy. Images from NASA’s Dawn spacecraft have revealed a dark, heavily cratered world whose brightest area is made of highly reflective salts — not ice.
But newly published studies from Dawn scientists show two distinct lines of evidence for ice at or near the surface of the dwarf planet. Researchers are presenting these findings at the 2016 American Geophysical Union meeting in San Francisco.
Written by Naomi Seck
Greenbelt, MD – Some 10,500 years ago, hunters gathered each year near the Beaver River in what is now western Oklahoma. There, they funneled bison into narrow, dead-end arroyos — steep gullies cut into the hillside by the river — where they killed them en masse, sliced off the choicest meat and left behind piles of skeletons.
Walk through western Oklahoma today and there is little visible evidence of that ancient landscape, much less the hunting expeditions it hosted. Few bison remain, and dirt and rocks have filled in many of the arroyos.
Written by Guy Webster
Pasadena, CA – Laser-zapping of a globular, golf-ball-size object on Mars by NASA’s Curiosity rover confirms that it is an iron-nickel meteorite fallen from the Red Planet’s sky.
Iron-nickel meteorites are a common class of space rocks found on Earth, and previous examples have been seen on Mars, but this one, called “Egg Rock,” is the first on Mars examined with a laser-firing spectrometer. To do so, the rover team used Curiosity’s Chemistry and Camera (ChemCam) instrument.
Written by Elizabeth Landau
Pasadena, CA – Ceres is covered in countless small, young craters, but none are larger than 175 miles (280 kilometers) in diameter. To scientists, this is a huge mystery, given that the dwarf planet must have been hit by numerous large asteroids during its 4.5 billion-year lifetime. Where did all the large craters go?
A new study in the journal Nature Communications explores this puzzle of Ceres’ missing large craters, using data from NASA’s Dawn spacecraft, which has been orbiting Ceres since March 2015.
Washington, D.C. – July is always a good time to assess where U.S. human space exploration has been and where it’s going. This year, July 20th marks the 40th anniversary of Viking, which in 1976 became the first spacecraft to land on Mars.
And just seven years — to the day — before Viking’s amazing feat, humans first set foot on another world, when Neil Armstrong and Buzz Aldrin set the Apollo 11 lunar module Eagle down in the moon’s Sea of Tranquility on July 20th, 1969.
Washington, D.C. – Pluto behaves less like a comet than expected and somewhat more like a planet like Mars or Venus in the way it interacts with the solar wind, a continuous stream of charged particles from the sun.
This is according to the first analysis of Pluto’s interaction with the solar wind, funded by NASA’s New Horizons mission and published today in the Journal of Geophysical Research – Space Physics by the American Geophysical Union (AGU).
Written by DC Agle
Pasadena, CA – NASA’s Near-Earth Object Wide-field Survey Explorer (NEOWISE) mission has released its second year of survey data. The spacecraft has now characterized a total of 439 NEOs since the mission was re-started in December 2013. Of these, 72 were new discoveries.
Near-Earth Objects (NEOs) are comets and asteroids that have been nudged by the gravitational attraction of the giant planets in our solar system into orbits that allow them to enter Earth’s neighborhood. Eight of the objects discovered in the past year have been classified as potentially hazardous asteroids (PHAs), based on their size and how closely their orbits approach Earth.
Written by DC Agle
Pasadena, CA – Astronomers were watching when comet P/2016 BA14 flew past Earth on March 22nd. At the time of its closest approach, the comet was about 2.2 million miles (3.5 million kilometers) away, making it the third closest comet flyby in recorded history (see “A ‘Tail’ of Two Comets”). Radar images from the flyby indicate that the comet is about 3,000 feet (1 kilometer) in diameter.
The scientists used the Goldstone Solar System Radar in California’s Mojave Desert to track the comet.
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