17
Nov 11

Cosmic particle accelerators get things going

Source: ESA


Artist's impression of the four Cluster spacecraft flying through the thin layer of Earth's bow shock.
Image credits: SA/AOES Medialab.

ESA's Cluster satellites have discovered that cosmic particle accelerators are more efficient than previously thought. The discovery has revealed the initial stages of acceleration for the first time, a process that could apply across the Universe.

On 9 January 2005, Cluster's four satellites passed through a magnetic shock high above Earth. The spinning craft were aligned almost perfectly with the magnetic field, allowing them to sample what was happening to electrons on very short timescales of 250 milliseconds or less.

The measurements showed that the electrons rose sharply in temperature, which established conditions favourable to larger scale acceleration. (read more)

Twitter del.icio.us Digg Facebook linked-in Yahoo Buzz StumbleUpon
9
Nov 11

NASA Captures New Images of Large Asteroid Passing Earth

Source: NASA


Radar image of asteroid 2005 YU55.
Image credits: NASA/JPL-Caltech.

NASA's Deep Space Network antenna in Goldstone, Calif. has captured new radar images of Asteroid 2005 YU55 passing close to Earth.

Twitter del.icio.us Digg Facebook linked-in Yahoo Buzz StumbleUpon
22
Oct 11

Aegean islands from Space

Source: ESA


Image credits: ESA

This Envisat image is dominated by the island of Crete separating the Aegean and Libyan Seas in the eastern Mediterranean.(learn more)

Twitter del.icio.us Digg Facebook linked-in Yahoo Buzz StumbleUpon
17
Oct 11

CryoSat rocking and rolling

Source: ESA


Credits: ESA /AOES Medialab.

ESA’s ice satellite is rolling left and right in orbit to help it continue its precise measurements of the vast ice sheets that blanket Greenland and Antarctica.(read more)

Twitter del.icio.us Digg Facebook linked-in Yahoo Buzz StumbleUpon
15
Oct 11

NASA and NOAA data shows significant Antarctic Ozone Hole remains

Source: NASA


The Ozone Hole on October 8th. Image credits: NASA/NOAA.

The Antarctic ozone hole, which yawns wide every Southern Hemisphere spring, reached its annual peak on Sept. 12. It stretched to 10.05 million square miles, the ninth largest ozone hole on record. Above the South Pole, the ozone hole reached its deepest point of the season on Oct. 9, tying this year for the 10th lowest in this 26-year record. (read more)

Twitter del.icio.us Digg Facebook linked-in Yahoo Buzz StumbleUpon
13
Oct 11

Amateur skywatchers help space hazards team

Source: ESA News


Detection of asteroid 2011 SF108.
Credits: ESA/TOTAS Survey Team

For the first time, observations coordinated by ESA's space hazards team have found an asteroid that comes close enough to Earth to pose an impact threat. The space rock was found by amateur astronomers, highlighting the value of 'crowd-sourcing' to science and planetary defense. (read more)

Twitter del.icio.us Digg Facebook linked-in Yahoo Buzz StumbleUpon
8
Oct 11

Arctic Sea ice continues to decline and hits second-lowest level

Source: NASA


Image credits: NASA.

Last month the extent of sea ice covering the Arctic Ocean declined to the second-lowest extent on record. Satellite data from NASA and the NASA-supported National Snow and Ice Data Center (NSIDC) at the University of Colorado in Boulder showed that the summertime sea ice cover narrowly avoided a new record low.

The Arctic ice cap grows each winter as the sun sets for several months and shrinks each summer as the sun rises higher in the northern sky. Each year the Arctic sea ice reaches its annual minimum extent in September. It hit a record low in 2007. (read more)

Twitter del.icio.us Digg Facebook linked-in Yahoo Buzz StumbleUpon
6
Oct 11

Did Earth's oceans come from comets?

Source: ESA Press Release


Herschel observed comet Hartley 2  represented in its orbit on the left side and
the inset on the right side shows the image obtained with Herschel’s PACS instrument.
The two lines are the water data from HIFI instrument.
Image Credits: ESA/AOES Medialab; Herschel/HssO Consortium.

ESA's Herschel infrared space observatory has found water in a comet with almost exactly the same composition as Earth's oceans. The discovery revives the idea that our planet's seas could once have been giant icebergs floating through space.(read more)

Twitter del.icio.us Digg Facebook linked-in Yahoo Buzz StumbleUpon
5
Oct 11

NASA leads study of unprecedented Arctic ozone loss

Source: NASA News


Artist's rendition for AURA.
Credit: NASA/AURA.

A NASA-led study has documented an unprecedented depletion of Earth's protective ozone layer above the Arctic last winter and spring caused by an unusually prolonged period of extremely low temperatures in the stratosphere.

The study, published online Sunday in the journal Nature, finds the amount of ozone destroyed in the Arctic in 2011 was comparable to that seen in some years in the Antarctic, where an ozone "hole" has formed each spring since the mid 1980s. The stratospheric ozone layer, extending from about 10 to 20 miles (15 to 35 kilometers) above the surface, protects life on Earth from the sun's harmful ultraviolet rays.

Twitter del.icio.us Digg Facebook linked-in Yahoo Buzz StumbleUpon
24
Sep 11

Our colourful planet - A new video by ESA

Source: ESA Videos

Loading...


Images taken by the optical and radar instruments on board ESA's Envisat Satellite orbiting 800 km above the Earth are set to relaxing music. Originally produced for Lufthansa inflight entertainment (released December 2010). (view video source)

Twitter del.icio.us Digg Facebook linked-in Yahoo Buzz StumbleUpon
18
Sep 11

Relax with Envisat

Source: ESA/YouTube

 

Images taken by the optical and radar instruments on board ESA's Envisat Satellite orbiting 800 km above the Earth are set to relaxing music. This video was originally produced for Lufthansa inflight entertainment.

Twitter del.icio.us Digg Facebook linked-in Yahoo Buzz StumbleUpon
25
Aug 11

Sunspot Breakthrough

Source: NASA Science  News

Based on the data from the Solar Dynamics Observatory, the movie shows
a sunspot emerging from depth in February 2011 (click on image above).
Source credit: Thomas Hartlep and Scott Winegarden, Stanford University.

A new breakthrough in sunspot detection could provide days of extra early warning for strong solar storms.(read more)

Twitter del.icio.us Digg Facebook linked-in Yahoo Buzz StumbleUpon
6
Aug 11

Earth from Space: Madagascar jellyfish

Source: ESA


Credits: JAXA, ESA.

The Betsiboka estuary in northwest Madagascar is pictured in this image from Japan’s ALOS observation satellite. (read more)

Twitter del.icio.us Digg Facebook linked-in Yahoo Buzz StumbleUpon
22
Jul 11

Horn of Africa drought seen from space

Source: ESA


SMOS satellite data, shows soil moisture in the Horn of Africa from April to mid-July 2011.
Image credits: CESBIO/ESA

Drought in Somalia, Kenya, Ethiopia and Djibouti is pushing tens of thousands of people from their homes as millions face food insecurity in a crisis visible from space. ESA’s SMOS satellite shows that the region’s soil is too dry to grow crops.(read more)

Twitter del.icio.us Digg Facebook linked-in Yahoo Buzz StumbleUpon
12
Jul 11

Galileo getting ready

Source: ESA videos


The Galileo constellation.

At the end of October a Soyuz launcher, the first ever from Europe's space port in French Guyane, will put into orbit the first two satellites of the Galileo Constellation.

After GIOVE A and B, launched in 2005 and 2008, to secure the Galileo frequencies and test the new technologies needed for satellite navigation, Galileo is now getting ready with the launch of this new phase of Galileo.

This "In Orbit Validation" phase means what it says: checking on orbit the European positioning system.(view video page)

Twitter del.icio.us Digg Facebook linked-in Yahoo Buzz StumbleUpon
25
Jun 11

A different approach to weather science explanations for extreme conditions

Source: NASA Science News

Image source: 90.7  The Capstone

Don't blame La Nina or El Nino for the recent wild weather in many parts of the World. According to Bill Patzert, a NASA climatologist, the real culprit is "La Nada." (read more)

Twitter del.icio.us Digg Facebook linked-in Yahoo Buzz StumbleUpon
24
Jun 11

CryoSat: Arctic ice map unveiled

Source: ESA


CryoSat’s exceptionally detailed data.
Image credits: CPOM/UCL/ESA.

 

The first map of sea-ice thickness from ESA’s CryoSat mission was revealed at the Paris Air and Space Show during last week. This new information is set to change our understanding of the complex relationship between ice and climate. (see video)

Twitter del.icio.us Digg Facebook linked-in Yahoo Buzz StumbleUpon
23
Jun 11

NASA flights seek to improve view of air pollution from Space

Source: NASA/Discover-AQ


Image credit: NASA.

Two NASA research airplanes will fly over the Baltimore-Washington region and northeast Maryland this summer as part of a mission to enhance the capability of satellites to measure ground-level air quality from space.

The campaign is called DISCOVER-AQ, which stands for Deriving Information on Surface conditions from Column and Vertically Resolved Observations Relevant to Air Quality. It is one of the five Earth Venture class of investigations selected last year as part of NASA's Earth System Science Pathfinder program. These targeted science investigations complement NASA's larger research missions.

A fundamental challenge for spaceborne instruments monitoring air quality is to distinguish between pollution high in the atmosphere and pollution near the surface where people live. The new NASA field campaign will make measurements from aircraft in combination with ground-based observation sites to help scientists better understand how to observe ground-level pollution from space in the future.(read more)

Twitter del.icio.us Digg Facebook linked-in Yahoo Buzz StumbleUpon
10
Jun 11

A gush of volcanic gas over Chile

Source: ESA


Image credit: Université Libre de Bruxelles (ULB). Source: ESA Release.

ESA has released an image that shows the huge plume of sulphur dioxide that spewed from Chile’s Puyehue-Cordón Caulle Volcanic Complex, which lies in the Andes about 600 km south of Santiago. (read more)

Twitter del.icio.us Digg Facebook linked-in Yahoo Buzz StumbleUpon
8
Jun 11

Aquarius to study the power of Sea Salt

Source: NASA Science

A new observatory is about to leave Earth to map a powerful compound of global importance: Common everyday sea salt. (read more)

Twitter del.icio.us Digg Facebook linked-in Yahoo Buzz StumbleUpon