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Latest Jets Stories

Concordia Is Opening The Curtains
2012-11-05 09:47:32

ESA Set against a star-studded backdrop and a splash of the Milky Way, the green glow of an auroral curtain pervades the permanently dark winter skies of the South Pole. The only sign of life here is the Concordia research station that ESA uses to prepare for future long-duration missions beyond Earth. The site also caters to scientific research from geology and glaciology to climate change, astronomy and planetary magnetic fields. Even though the Sun barely peeks above the horizon...

Earth’s Magnetosphere Operates Like A Filter
2012-10-24 11:46:18

ESA´s quartet of satellites studying Earth´s magnetosphere, Cluster, has discovered that our protective magnetic bubble lets the solar wind in under a wider range of conditions than previously believed. Earth´s magnetic field is our planet´s first line of defense against the bombardment of the solar wind. This stream of plasma is launched by the Sun and travels across the Solar System, carrying its own magnetic field with it. Depending on how the solar wind´s...

Black Hole Afterburner Moves At The Speed Of Light
2012-10-23 09:02:38

[ Watch the Video: High Speed Video Of Shock Diamond ] April Flowers for redOrbit.com - Your Universe Online A supersonic jet of material that looks amazingly similar to the afterburner flow of a fighter jet is blasting over two million light-years from the center of a distant galaxy. The big difference, however, is that the jet engine responsible for this material is a supermassive black hole and the material is moving at nearly the speed of light. A new study, published this past...

Everything You Need To Know About This Weekend’s Orionid Meteor Shower
2012-10-18 16:39:30

[WATCH VIDEO: A Meteor Shower From Halley's Comet] Lawrence LeBlond for redOrbit.com - Your Universe Online Throughout the year Earth´s denizens are offered a number of good opportunities to witness meteor showers illuminating the night skies, with streaks of white lights racing across the upper atmosphere at lightning speed. Some of these seemingly heavenly showers, such as the late-April Lyrids, the Perseids of mid-August, and the often-spectacular Leonids, which arrive in...

Reports Of Giant Fireball Blazing Across California Night Sky, Experts Say Part Of Orionid Meteor Shower
2012-10-18 06:37:38

[WATCH VIDEO: A Meteor Shower From Halley's Comet] Lawrence LeBlond for redOrbit.com - Your Universe Online The National Weather Service (NWS) received numerous calls last night (October 17) from Central Valley to the Bay Area in California, with callers claiming they had witnessed a giant fireball blazing across the night sky. The fireball was reportedly witnessed between about 7:45 and 7:55 p.m. PST. “We've had a lot of calls about people who have seen a big fireball,”...

Wide-Eyed Super Typhoon Jelawat Seen By NASA
2012-09-28 13:54:02

One day ago, Super Typhoon Jelawat's eye was about 25 nautical miles in diameter, today, Sept. 27, NASA satellite data indicated that eye has grown to 36 nautical miles! The latest infrared image from the Atmospheric Infrared Sounder (AIRS) instrument that flies on NASA's Aqua satellite shows a clear eye in Typhoon Jelawat on Sept. 25. The cloud top temperatures of the thunderstorms surrounding the eye exceed -63 Fahrenheit (-52 Celsius) indicating that they are very powerful and heavy...

Astronomers Measure Black Hole Radius
2012-09-27 19:16:53

Lee Rannals for redOrbit.com — Your Universe Online An international team of astronomers was able to measure the radius of a black hole for the first time. Researchers measured the radius of a black hole at the center of the galaxy M87, which lies about 50 million light-years away from the Milky Way. M87 has a black hole 6 billion times more massive than the Sun, and the team was able to observe the glow of matter near the edge of the black hole, or the "event horizon," using...

Hurricane Lane Punched In The Eye Seen By Nasa
2012-09-19 07:29:28

Powerful thunderstorms wrapped tightly around Hurricane Lane's center as it continued moving through the eastern Pacific Ocean. When NASA's Terra satellite passed over Lane it captured a close-up view of the storm and noticed that Lane's eye had become cloud-filled as if being punched in the eye. Nature is expected to fight Lane more and win over the next couple of days. The Moderate Resolution Imaging Spectroradiometer (MODIS) instrument captured a close-up of Lane on Sept. 17 at 3:25...

Cluster Examines Thin Current Sheets In The Magnetosphere
2012-08-02 05:08:15

April Flowers for redOrbit.com - Your Universe Online The Universe is filled with plasma, a charged gas consisting of ions and electrons. Thin sheets, or boundaries, with currents separate large plasma regions. These boundaries are where most of the exciting action in space happens. Scientists at the Swedish Institute of Space Physics (IRF) have measured the fundamental properties of one of the waves mixing and accelerating plasmas within these sheets. These thin current sheets are...

Waves In The Magnetosphere's Thin Boundaries Looked At By Cluster
2012-08-01 16:08:16

Exploiting a favorable configuration of ESA's Cluster mission spacecraft, scientists have detected and characterized lower hybrid drift waves, a special kind of plasma waves that develop in thin boundaries both in space and in the laboratory. The measurement of fundamental properties of these waves was possible when two of the spacecraft were flying very close to one another in the tail of Earth's magnetosphere. With wavelengths of about 60 km, these waves appear to play an important role in...


Latest Jets Reference Libraries

Ring Current
2004-10-19 04:45:44

Ring Current -- A ring current is an electric current carried by charged particles trapped in a planet's magnetosphere. It is caused by the longitudinal drift of energetic (10-200 keV) particles. Earth's Ring Current Earth's ring current is responsible for geomagnetic storms. The ring current system consists of a band, at a distance of 3-5 RE(1), which lies in the equatorial plane and circulates clockwise around the Earth (when viewed from the north). The particles of this region...

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2004-10-19 04:45:41

Microquasar -- Microquasars are smaller cousins of quasars. They are named after quasars, as they have some common characteristics: strong and variable radio emission often seen as radio jets, and an accretion disk surrounding a black hole. In quasars, the black hole is supermassive (millions of solar masses) as in microquasars, the black hole mass is a few solar masses. In microquasars, the accreted mass comes from a normal star and the accretion disk is very luminous in optical regions...

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2004-10-19 04:45:41

Aurora -- The Polar Aurora are natural displays of light in the sky that can be seen with the unaided eye only at night. An auroral display in the Northern Hemisphere is called the aurora borealis, or the northern lights; in the Southern Hemisphere it is called the aurora australis. Auroras are the most visible effect of the sun's activity on the earth's atmosphere. The beautiful and often eerie curtains of light in the night time sky have been observed by people for millennia. An aurora...

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2004-10-19 04:45:41

Van Allen Radiation Belt -- The Van Allen radiation belt is a torus of energetic charged particles around Earth, trapped by Earth's magnetic field. The presence of a radiation belt had been theorized prior to the Space Age and the belt's presence was confirmed by the Explorer I on January 31, 1958 and Explorer III missions, under Doctor James Van Allen. The trapped radiation was first mapped out by Explorer IV and Pioneer III. Qualitatively, it is useful to view this belt as consisting...

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2004-10-19 04:45:41

Solar Wind -- Solar wind, a stream of particles (mostly high-energy protons ~ 500 Kev) that is continually ejected from the surface of the Sun. The composition of this plasma is identical to the Sun's corona, 73% hydrogen and 25% helium with the remainder as trace impurities, and is ionized. Near Earth, the velocity of the solar wind varies from 200km/s-889km/s. The average is 450 km/s. Approximately 3000 tons of material is lost from the Sun every hour as solar wind. Since solar...

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Word of the Day
grass-comber
  • A landsman who is making his first voyage at sea; a novice who enters naval service from rural life.
According to the OED, a grass-comber is also 'a sailor's term for one who has been a farm-labourer.'