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Astronomy/Space Science



Results 41 - 60 of 169.


Astronomy / Space Science - Chemistry - 27.09.2013
Chronobiology: Not everything revolves around the sun
Researchers in Vienna shed light on the interplay of a worm's inner clocks For a long time, molecular chronobiology has almost exclusively focused on circadian rhythms that are driven by the changes of day and night and hence follow the daily cycle of the sun. However, especially in the sea, the cradle of evolution, organisms set their pace also according to the moon.

Astronomy / Space Science - Earth Sciences - 26.09.2013
Water for future Mars astronauts?
Water for future Mars astronauts?
Within its first three months on Mars, NASA's Curiosity Rover saw a surprising diversity of soils and sediments along a half-kilometer route that tell a complex story about the gradual desiccation of the Red Planet. "We made this discovery literally with the very first laser shot on the Red Planet," said Roger Wiens, leader of the ChemCam instrument team.

Astronomy / Space Science - Chemistry - 25.09.2013
Observations reveal critical interplay of interstellar dust, hydrogen
Intense molecular hydrogen formation shown in near infrared image of the reflection nebula IC 63 in the constellation Cassiopeia. The white bars represent polarization seen toward stars in the background of the nebula. The largest polarization shows the most intense emission, demonstrating that hydrogen formation influences alignment of the dust grain with a magnetic field. For astrophysicists, the interplay of hydrogen - the most common molecule in the universe - and the vast clouds of dust that fill the voids of interstellar space has been an intractable puzzle of stellar evolution.

Astronomy / Space Science - 24.09.2013
The dragon awakes - colossal explosion from the
Two million years ago a supermassive black hole at the heart of our galaxy erupted in an explosion so immensely powerful that it lit up a cloud 200,000 light years away, a team of researchers led by the University of Sydney has revealed. The finding is an exciting confirmation that black holes can 'flicker', moving from maximum power to switching off over, in cosmic terms, short periods of time.

Astronomy / Space Science - Physics - 20.09.2013
Galactic ’vapour trails’ uncovered in giant cluster
Astronomers have discovered enormous smooth shapes that look like vapour trails in a gigantic galaxy cluster. These 'arms' span half a million light years and provide researchers with clues to a billion years of collisions within the "giant cosmic train wreck" of the Coma cluster. Coma is like a giant cosmic train wreck where several clusters have collided with each other.

Environment - Astronomy / Space Science - 17.09.2013
Stronger winds explain puzzling growth of sea ice in Antarctica
Stronger winds explain puzzling growth of sea ice in Antarctica
Much attention is paid to melting sea ice in the Arctic. But less clear is the situation on the other side of the planet. Despite warmer air and oceans, there's more sea ice in Antarctica now than in the 1970s - a fact often pounced on by global warming skeptics. The latest numbers suggest the Antarctic sea ice may be heading toward a record high this year.

Astronomy / Space Science - Electroengineering - 17.09.2013
Space weather’s effects on satellites
Is your cable television on the fritz? One explanation, scientists suspect, may be the weather - the weather in space, that is. MIT researchers are investigating the effects of space weather - such as solar flares, geomagnetic storms and other forms of electromagnetic radiation - on geostationary satellites, which provide much of the world's access to cable television, Internet services and global communications.

Astronomy / Space Science - 16.09.2013
New insights solve 300-year-old problem: the dynamics of the Earth’s core
Scientists at the University of Leeds have solved a 300-year-old riddle about which direction the centre of the Earth spins. The Earth’s inner core, made up of solid iron, ‘superrotates’ in an eastward direction – meaning it spins faster than the rest of the planet – while the outer core, comprising mainly molten iron, spins westwards at a slower pace.

Environment - Astronomy / Space Science - 15.09.2013
Achilles’ heel of ice shelves is beneath the water, scientists reveal
New research has revealed that more ice leaves Antarctica by melting from the underside of submerged ice shelves than was previously thought, accounting for as much as 90 per cent of ice loss in some areas. Iceberg production and melting causes 2,800 cubic kilometres of ice to leave the Antarctic ice sheet every year.

Astronomy / Space Science - Social Sciences - 13.09.2013
"Red Nugget" Galaxies Were Hiding in Plain Sight
Cambridge, MA - In 2005 the Hubble Space Telescope spotted unusually small galaxies densely packed with red stars in the distant, young universe. They were nicknamed "red nuggets," not only because they are small and red but also their existence challenged current theories of galaxy formation, making them precious in astronomers' eyes.

Astronomy / Space Science - 11.09.2013
New dimensions on ice
11 September 2013 Offering new insights into our fragile polar regions, ESA's CryoSat mission has provided three consecutive years of Arctic sea-ice thickness measurements, which show that the ice continues to thin. Although satellites have witnessed a downward trend in the extent of sea ice over the last two decades, it is essential to have accurate information on the mass or volume of ice being lost.

Astronomy / Space Science - 06.09.2013
Spacecraft measures changes in direction of solar system’s interstellar winds
Data from NASA's Interstellar Boundary Explorer spacecraft reveal that neutral interstellar atoms are flowing into the solar system from a different direction than previously observed. Interstellar atoms flow past the Earth as the solar system passes through the surrounding interstellar cloud at 23 kilometers per second (50,000 miles per hour).

Astronomy / Space Science - 05.09.2013
Coldest Brown Dwarfs Blur Lines between Stars and Planets
Cambridge, MA - Astronomers are constantly on the hunt for ever-colder star-like bodies, and two years ago a new class of objects was discovered by researchers using NASA's WISE space telescope. However, until now no one has known exactly how cool their surfaces really are - some evidence suggested they could be room temperature.

Astronomy / Space Science - Physics - 04.09.2013
Mysterious alignment of ghostly stars discovered
Mysterious alignment of ghostly stars discovered
04 Sep 2013 Astronomers have used the NASA/ESA Hubble Space Telescope and ESO's New Technology Telescope to explore more than 100 planetary nebulae in the central bulge of our galaxy. They have found that butterfly-shaped members of this cosmic family tend to be mysteriously aligned — a surprising result given their different histories and varied properties.

Astronomy / Space Science - 02.09.2013
Galileo’s secure service tested by Member States
2 September 2013 EU Member States have begun their independent testing of the most accurate and secure signal broadcast by the four Galileo navigation satellites in orbit. Transmitted on two frequency bands with enhanced protection, the Public Regulated Service (PRS) offers a highly accurate positioning and timing service, with access strictly restricted to authorised users.

Astronomy / Space Science - 29.08.2013
Our galaxy’s giant black hole rejects ’food’ because it’s too ’hot’
Astronomers working with NASA'S Chandra X-ray Observatory have seen the giant black hole Sagittarius A* rejecting it's 'food' of vast gas clouds as they aren't sufficiently cool enough for it to swallow. Sgr A* is one of very few black holes where we can actually witness the process Q. Daniel Wang The giant black hole at the centre of the Milky Way appears to be on a severe diet.

Astronomy / Space Science - 29.08.2013
An answer to why our galaxy’s black hole is a finicky eater
Researchers find material ejects itself before black hole can devour it. For years, scientists have observed that the black hole at the center of our galaxy has a surprisingly small appetite. While the black hole, named Sagittarius A* (pronounced Sagittarius A-star), is 4 million times as massive as the sun, it is unusually inactive for its size, devouring very little of the surrounding gas and other galactic material.

Astronomy / Space Science - Physics - 21.08.2013
New Results from Daya Bay – Tracking the Disappearance of Ghostlike Neutrinos
d The Daya Bay Neutrino Experiment is designed to provide new understanding of neutrino oscillations that can help answer some of the most mysterious questions about the universe. Shown here are the photomultiplier tubes in the Daya Bay detectors.

Astronomy / Space Science - Chemistry - 20.08.2013
As they form, stars shape their womb from within
As they form, stars shape their womb from within
Star formation is an even more intense and dynamic process than previously thought, according to research based on data from one of the world's newest and most powerful telescopes. As stars form in clouds of gas and dust, they shoot powerful jets of gas and other raw material outward. Analysis of fresh high-resolution images of fast-moving emissions from a well-known protostar refines the existing picture of the outflows' size, shape, and motion, and shows that they are moving at greater velocities than previously measured, researchers report Aug.

Astronomy / Space Science - Physics - 19.08.2013
Waking up to a new year
Paper: "The Roche Limit for Close-orbiting Planets: Minimum Density, Composition Constraints, and Application to the 4.2 hr Planet KOI 1843.03" MIT team discovers an exoplanet that orbits its star in 8.5 hours. In the time it takes you to complete a single workday, or get a full night's sleep, a small fireball of a planet 700 light-years away has already completed an entire year.