2015 Antarctic Ozone Hole larger and formed later than previous holes
October 30, 2015 06:17 AM - NASA
The 2015 Antarctic ozone hole area was larger and formed later than in recent years, said scientists from NASA and the National Oceanic and Atmospheric Administration (NOAA).
Black Holes and their flares studied by NASA missions
October 27, 2015 07:48 PM - NASA JPL - California Institute of Technology
The baffling and strange behaviors of black holes have become somewhat less mysterious recently, with new observations from NASA's Explorer missions Swift and the Nuclear Spectroscopic Telescope Array, or NuSTAR. The two space telescopes caught a supermassive black hole in the midst of a giant eruption of X-ray light, helping astronomers address an ongoing puzzle: How do supermassive black holes flare?
The results suggest that supermassive black holes send out beams of X-rays when their surrounding coronas -- sources of extremely energetic particles -- shoot, or launch, away from the black holes.
"This is the first time we have been able to link the launching of the corona to a flare," said Dan Wilkins of Saint Mary's University in Halifax, Canada, lead author of a new paper on the results appearing in the Monthly Notices of the Royal Astronomical Society. "This will help us understand how supermassive black holes power some of the brightest objects in the universe."
Artificial lung to help study air pollution effects
October 23, 2015 09:11 AM - NoCamels Team, NoCamels
Air pollution is one of the leading causes of lung cancer and respiratory diseases, responsible for one in eight global deaths, according to the World Health Organisation.
However, researchers will soon be able to develop new treatments for such diseases with a life-sized, artificial human lung created at the Technion-Israel Institute of Technology in Haifa, Israel. It is the first diagnostic tool for understanding in real time how tiny particles move and behave in the deepest part of the human lungs, the alveolar tissue.
Newly discovered large asteroid will make flyby on Halloween
October 23, 2015 07:11 AM - Universtiy of Hawaii, Manoa
A large near-Earth asteroid named 2015 TB145, discovered on October 10 by the University of Hawaiʻi’s Pan-STARRS1 Telescope atop Haleakala, Maui, will pass close to Earth on October 31. The asteroid has a diameter of approximately 400 meters (1,300 feet), and will pass within approximately 480,000 km (300,000 miles) of Earth. There is no possibility of this object impacting Earth.
The asteroid is already being studied by telescopes across the planet, and soon will be targeted by radar observations that will look for details as small as 2 meters (6.5 feet) on its surface. The radar observations will directly measure its size and shape, and determine whether the object has any satellites.
NASA Spots the 'Great Pumpkin'; Get ready to see a Halloween Asteroid!
October 22, 2015 09:31 AM - NASA Jet Propulsion Laboratory
NASA scientists are tracking the upcoming Halloween flyby of asteroid 2015 TB145 with several optical observatories and the radar capabilities of the agency's Deep Space Network at Goldstone, California. The asteroid will fly past Earth at a safe distance slightly farther than the moon's orbit on Oct. 31 at 10:05 a.m. PDT (1:05 p.m. EDT). Scientists are treating the flyby of the estimated 1,300-foot-wide (400-meter) asteroid as a science target of opportunity, allowing instruments on "spacecraft Earth" to scan it during the close pass.
Asteroid 2015 TB145 was discovered on Oct. 10, 2015, by the University of Hawaii's Pan-STARRS-1 (Panoramic Survey Telescope and Rapid Response System) on Haleakala, Maui, part of the NASA-funded Near-Earth Object Observation (NEOO) Program. According to the catalog of near-Earth objects (NEOs) kept by the Minor Planet Center, this is the closest currently known approach by an object this large until asteroid 1999 AN10, at about 2,600 feet (800 meters) in size, approaches at about 1 lunar distance (238,000 miles from Earth) in August 2027.
NASA studies LA earthquake
October 21, 2015 06:19 AM - NASA Jet Propulsion Laboratory
A new NASA-led analysis of a moderate magnitude 5.1 earthquake that shook Greater Los Angeles in 2014 finds that the earthquake deformed Earth's crust across a broad region encompassing the northern Los Angeles Basin and northern Orange County. The shallow ground movements observed from this earthquake likely reflect strain accumulated on deeper faults, which remain locked and may be capable of producing future earthquakes.
A team of NASA and university researchers led by geophysicist Andrea Donnellan of NASA's Jet Propulsion Laboratory, Pasadena, California, used GPS and NASA airborne radar data to measure surface deformation in Earth's crust caused by the March 28, 2014, earthquake, which was centered in La Habra, California. The earthquake was felt widely in Orange, Los Angeles, Ventura, Riverside, San Bernardino, Kern and San Diego counties. While the earthquake was relatively moderate in size, the earthquake's depth (3.6 miles, or 5.85 kilometers) and location within a highly populated region resulted in more than $12 million in damage. Most of the damage occurred within a 3.7-mile (6-kilometer) radius of the epicenter, with a substantial amount of damage south of the main rupture.
Global Ocean found in Saturn's Moon Enceladus
October 18, 2015 07:43 AM - NASA JPL
A global ocean lies beneath the icy crust of Saturn's geologically active moon Enceladus, according to new research using data from NASA's Cassini mission.
Researchers found the magnitude of the moon's very slight wobble, as it orbits Saturn, can only be accounted for if its outer ice shell is not frozen solid to its interior, meaning a global ocean must be present.
The finding implies the fine spray of water vapor, icy particles and simple organic molecules Cassini has observed coming from fractures near the moon's south pole is being fed by this vast liquid water reservoir. The research is presented in a paper published online this week in the journal Icarus.
Dates of lunar impacts refined
October 16, 2015 04:51 PM - Universtiy of Wisconsin-Madison via EurekAlert
Phenomenally durable crystals called zircons are used to date some of the earliest and most dramatic cataclysms of the solar system. One is the super-duty collision that ejected material from Earth to form the moon roughly 50 million years after Earth formed. Another is the late heavy bombardment, a wave of impacts that may have created hellish surface conditions on the young Earth, about 4 billion years ago.
Both events are widely accepted but unproven, so geoscientists are eager for more details and better dates. Many of those dates come from zircons retrieved from the moon during NASA's Apollo voyages in the 1970s.
Mars once supported lakes of liquid water
October 9, 2015 08:22 AM - JPL NASA
A new study from the team behind NASA's Mars Science Laboratory/Curiosity has confirmed that Mars was once, billions of years ago, capable of storing water in lakes over an extended period of time.
Using data from the Curiosity rover, the team has determined that, long ago, water helped deposit sediment into Gale Crater, where the rover landed more than three years ago. The sediment deposited as layers that formed the foundation for Mount Sharp, the mountain found in the middle of the crater today.
NASA Confirms Water Flows on Mars
September 29, 2015 08:40 AM - NASA Jet Propulsion Laboratory
New findings from NASA's Mars Reconnaissance Orbiter (MRO) provide the strongest evidence yet that liquid water flows intermittently on present-day Mars.
Using an imaging spectrometer on MRO, researchers detected signatures of hydrated minerals on slopes where mysterious streaks are seen on the Red Planet.