Clarksville, TN Online: News, Opinion, Arts & Entertainment.


Topic: European Space Agency

NASA reports discovery of a Gravitational Vortex around a Black Hole

 

Written by Karen O’Flaherty
European Space Agency

NASA - National Aeronautics and Space AdministrationPasadena, CA – The European Space Agency’s orbiting X-ray observatory, XMM-Newton, has proved the existence of a “gravitational vortex” around a black hole. The discovery, aided by NASA’s Nuclear Spectroscopic Telescope Array (NuSTAR) mission, solves a mystery that has eluded astronomers for more than 30 years, and will allow them to map the behavior of matter very close to black holes. It could also open the door to future investigations of Albert Einstein’s general relativity.

Matter falling into a black hole heats up as it plunges to its doom. Before it passes into the black hole and is lost from view forever, it can reach millions of degrees. At that temperature it shines X-rays into space.

This artist's impression depicts the accretion disc surrounding a black hole, in which the inner region of the disc precesses.

This artist’s impression depicts the accretion disc surrounding a black hole, in which the inner region of the disc precesses.

«Read the rest of this article»

Sections: Technology | No Comments
 

NASA reports LISA Pathfinder Mission tests technology for detecting Gravitional Waves

 

Written by Francis Reddy
NASA’s Goddard Space Flight Center

NASA - National Aeronautics and Space AdministrationGreenbelt, MDLISA Pathfinder, a mission led by the European Space Agency (ESA) with contributions from NASA, has successfully tested a key technology needed to build a space-based observatory for detecting gravitational waves.

These tiny ripples in the fabric of space, predicted by Albert Einstein a century ago, were first seen last year by the ground-based Laser Interferometer Gravitational-Wave Observatory (LIGO).

Seismic, thermal and other noise sources limit LIGO to higher-frequency gravitational waves around 100 cycles per second (hertz).

The LISA Pathfinder spacecraft will help pave the way for a mission to detect gravitational waves. NASA/JPL developed a thruster system onboard. (ESA)

The LISA Pathfinder spacecraft will help pave the way for a mission to detect gravitational waves. NASA/JPL developed a thruster system onboard. (ESA)

«Read the rest of this article»

Sections: Technology | No Comments
 

NASA’s Kepler Space Telescope discovers biggest unnamed dwarf planet in our Solar System

 

Written by Michele Johnson
NASA’s Ames Research Center

NASA - National Aeronautics and Space AdministrationMoffett Field, CA – Dwarf planets tend to be a mysterious bunch. With the exception of Ceres, which resides in the main asteroid belt between Mars and Jupiter, all members of this class of minor planets in our solar system lurk in the depths beyond Neptune.

They are far from Earth – small and cold – which makes them difficult to observe, even with large telescopes. So it’s little wonder astronomers only discovered most of them in the past decade or so.

Pluto is a prime example of this elusiveness. Before NASA’s New Horizons spacecraft visited it in 2015, the largest of the dwarf planets had appeared as little more than a fuzzy blob, even to the keen-eyed Hubble Space Telescope.

New K2 results peg 2007 OR10 as the largest unnamed body in our solar system and the third largest of the current roster of about half a dozen dwarf planets. The dwarf planet Haumea has an oblong shape that is wider on its long axis than 2007 OR10, but its overall volume is smaller. (Konkoly Observatory/András Pál, Hungarian Astronomical Association/Iván Éder, NASA/JHUAPL/SwRI)

New K2 results peg 2007 OR10 as the largest unnamed body in our solar system and the third largest of the current roster of about half a dozen dwarf planets. The dwarf planet Haumea has an oblong shape that is wider on its long axis than 2007 OR10, but its overall volume is smaller. (Konkoly Observatory/András Pál, Hungarian Astronomical Association/Iván Éder, NASA/JHUAPL/SwRI)

«Read the rest of this article»

Sections: Technology | No Comments
 


NASA to use Spacecraft Orbiting Earth to track Air Pollution

 

Written by Steve Cole
NASA Headquarters

NASA - National Aeronautics and Space AdministrationWashington, D.C. – For more than three decades NASA has focused its space-faring skills and science chops CSI-like on an elusive global killer. Later this month, that pursuit takes us to East Asia. In a few years, part way to the moon.

We are getting close.

Air pollution causes an estimated 152,000 deaths a year across the Americas and more than 2 million deaths in the Western Pacific, according to the United Nations. Some parts of the world have a detailed view of local air quality from ground sensor networks and forecast models that generate public alerts. But for much of the world this type of information and warning are not available.

Satellites have documented that human-produced and natural air pollution can travel a long way. This 2014 NASA satellite image shows a long river of dust from western Africa (bottom of image) push across the Atlantic Ocean. (NASA)

Satellites have documented that human-produced and natural air pollution can travel a long way. This 2014 NASA satellite image shows a long river of dust from western Africa (bottom of image) push across the Atlantic Ocean. (NASA)

«Read the rest of this article»

Sections: Technology | No Comments
 

NASA’s Cassini spacecraft encounters dust from Interstellar Space

 

Written by Emily Baldwin
European Space Agency

NASA - National Aeronautics and Space AdministrationPasadena, CA – NASA’s Cassini spacecraft has detected the faint but distinct signature of dust coming from beyond our solar system. The research, led by a team of Cassini scientists primarily from Europe, is published this week in the journal Science.

Cassini has been in orbit around Saturn since 2004, studying the giant planet, its rings and its moons. The spacecraft has also sampled millions of ice-rich dust grains with its cosmic dust analyzer instrument. The vast majority of the sampled grains originate from active jets that spray from the surface of Saturn’s geologically active moon Enceladus.

Of the millions of dust grains Cassini has sampled at Saturn, a few dozen appear to have come from beyond our solar system. Scientists believe these special grains have interstellar origins because they moved much faster and in different directions compared to dusty material native to Saturn. (NASA/JPL-Caltech)

Of the millions of dust grains Cassini has sampled at Saturn, a few dozen appear to have come from beyond our solar system. Scientists believe these special grains have interstellar origins because they moved much faster and in different directions compared to dusty material native to Saturn. (NASA/JPL-Caltech)

«Read the rest of this article»

Sections: Technology | No Comments
 

NASA reports Radio Telescopes could soon detect Low-Frequency Gravitational Waves

 

Written by Elizabeth Ferrara
NANOGrav

NASA - National Aeronautics and Space AdministrationPasadena, CA – The recent detection of gravitational waves by the Laser Interferometer Gravitational-Wave Observatory (LIGO) came from two black holes, each about 30 times the mass of our sun, merging into one. Gravitational waves span a wide range of frequencies that require different technologies to detect.

A new study from the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) has shown that low-frequency gravitational waves could soon be detectable by existing radio telescopes.

Gravitational waves are ripples in space-time, represented by the green grid, produced by accelerating bodies such as interacting supermassive black holes. These waves affect the time it takes for radio signals from pulsars to arrive at Earth. (David Champion)

Gravitational waves are ripples in space-time, represented by the green grid, produced by accelerating bodies such as interacting supermassive black holes. These waves affect the time it takes for radio signals from pulsars to arrive at Earth. (David Champion)

«Read the rest of this article»

Sections: Technology | No Comments
 

NASA’s Cassini Spacecraft to move into higher orbit around Saturn

 

Written by Preston Dyches
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – NASA’s Cassini mission is entering its next chapter with an orbital choreography meant to tilt the spacecraft’s orbit out of Saturn’s ringplane.

The second of five large propulsive maneuvers in this campaign took place on Saturday, January 23rd. Each maneuver in the series sets up a subsequent gravity-assist flyby of Saturn’s massive moon Titan, which reshapes the spacecraft’s orbit, sending it to increasingly higher inclination with respect to Saturn’s equator.

This is an artists concept of Cassini during the Saturn Orbit Insertion (SOI) maneuver, just after the main engine has begun firing. (NASA/JPL)

This is an artists concept of Cassini during the Saturn Orbit Insertion (SOI) maneuver, just after the main engine has begun firing. (NASA/JPL)

«Read the rest of this article»

Sections: Technology | No Comments
 


NASA’s LISA Pathfinder spacecraft thrusters pass their functional tests

 

Written by Elizabeth Landau
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – While some technologies were created to make spacecraft move billions of miles, the Disturbance Reduction System has the opposite goal: To keep a spacecraft as still as possible.

The thruster system, managed by NASA’s Jet Propulsion Laboratory, Pasadena, California, is part of the European Space Agency’s LISA Pathfinder spacecraft, which launched from Kourou, French Guiana on December 3rd, 2015 GMT (December 2nd PST).

LISA Pathfinder will test technologies that could one day allow detection of gravitational waves, whose effects are so miniscule that a spacecraft would need to remain extremely steady to detect them.

The LISA Pathfinder spacecraft will help pave the way for a mission to detect gravitational waves. NASA/JPL developed a thruster system onboard. (ESA)

The LISA Pathfinder spacecraft will help pave the way for a mission to detect gravitational waves. NASA/JPL developed a thruster system onboard. (ESA)

«Read the rest of this article»

Sections: Technology | No Comments
 

NASA’s Juno mission achieves Distance Record for Solar Powered Spacecraft

 

Written by DC Agle
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – NASA’s Juno mission to Jupiter has broken the record to become humanity’s most distant solar-powered emissary. The milestone occurred at 11:00am PT (2:00pm ET, 19:00 UTC) on Wednesday, January 13th, when Juno was about 493 million miles (793 million kilometers) from the sun.

The previous record-holder was the European Space Agency’s Rosetta spacecraft, whose orbit peaked out at the 492-million-mile (792-million-kilometer) mark in October 2012, during its approach to comet 67P/Churyumov-Gerasimenko.

Launching from Earth in 2011, the Juno spacecraft will arrive at Jupiter in 2016 to study the giant planet from an elliptical, polar orbit. Juno will repeatedly dive between the planet and its intense belts of charged particle radiation, coming only 5,000 kilometers (about 3,000 miles) from the cloud tops at closest approach. (NASA/JPL-Caltech)

Launching from Earth in 2011, the Juno spacecraft will arrive at Jupiter in 2016 to study the giant planet from an elliptical, polar orbit. Juno will repeatedly dive between the planet and its intense belts of charged particle radiation, coming only 5,000 kilometers (about 3,000 miles) from the cloud tops at closest approach. (NASA/JPL-Caltech)

«Read the rest of this article»

Sections: Technology | No Comments
 

NASA reports Euclid Mission to investigate mysteries of Dark Matter and Dark Energy

 

Written by Whitney Clavin
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – Euclid, a planned mission to investigate the profound cosmic mysteries of dark matter and dark energy, has passed its preliminary design review. This clears the way for construction to begin.

Euclid is a European Space Agency mission with important contributions from NASA, including infrared detectors for one instrument and science and data analysis.

Euclid is designed to give us important new insights into the “dark side” of the universe — namely dark matter and dark energy, both thought to be key components of our cosmos.

Artist's impression of the Euclid spacecraft, a dark energy and dark matter mission planned for launch in 2020. (ESA/C. Carreau)

Artist’s impression of the Euclid spacecraft, a dark energy and dark matter mission planned for launch in 2020. (ESA/C. Carreau)

«Read the rest of this article»

Sections: Technology | No Comments
 


Page 1 of 2212345...»

  • Visit Us On FacebookVisit Us On TwitterVisit Us On GooglePlusVisit Us On PinterestVisit Us On YoutubeCheck Our Feed
  • Personal Controls

    Archives