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Latest Observational astronomy Stories

High-contrast, High-resolution CT Scans Possible At Low Dose
2012-06-05 06:55:54

Soft body tissue can now be imaged with incredible detail using X-rays thanks to a new low dose CT-scan technique Scientists have developed an X-ray imaging method that could drastically improve the contrast of computed tomography (CT) scans whilst reducing the radiation dose deposited during the scan. The new method is based on the combination of the high contrast obtained by an X-ray technique known as grating interferometry with the three-dimensional capabilities of CT. It is also...

Black Hole Caught Exiting Host Galaxy
2012-06-05 04:22:57

Lee Rannals for redOrbit.com New observations from NASA's Chandra X-ray Observatory suggest that a black hole is being ejected from its host galaxy at several million miles per hour. The finding could mean that there are many giant black holes that are roaming around undetected out in the vast spaces between galaxies. "It's hard to believe that a supermassive black hole weighing millions of times the mass of the sun could be moved at all, let alone kicked out of a galaxy at enormous...

NRO Gives NASA Two Hubble Sized Telescopes
2012-06-05 04:15:46

Lee Rannals for redOrbit.com The National Reconnaissance Office (NRO) announced on Monday that it will be giving two telescopes as big as the Hubble Space Telescope to NASA. The 7.9-feet mirror telescopes have 100 times the field of view of the Hubble, according to David Spergel, a Princeton astrophysicist and co-chair of the National Academies advisory panel on astronomy and astrophysics. If used as originally intended, NASA official Michael Moore told the Washington Post that the...

A deep look at the strange galaxy Centaurus A
2012-06-02 11:53:03

A new image of the center of the distinctive galaxy Centaurus A, made with the Atacama Large Millimeter/submillimeter Array (ALMA), shows how the new telescope, which is still under construction, allows astronomers to see with unprecedented quality through the opaque dust lanes that obscure the galaxy's center. Centaurus A is a massive elliptical radio galaxy (a galaxy that emits strong radio waves) and is the most prominent, as well as the nearest, radio galaxy in the sky. Its very...

Giant Radio Telescope Gets Two Different Locations
2012-05-26 04:31:25

Lee Rannals for RedOrbit.com Australia and South Africa will host a giant radio telescope made up of thousands of separate dishes, which will help scientists gain a better understanding of our universe. South Africa and Australia both battled for bidding for the Square Kilometre Array (SKA) telescope project, but South Africa came away with a victory by capturing two parts of the three-part project. "We may feel slightly disappointed that we didn't get the whole thing. But I think...

Tiny Planet-Finding Mirrors Borrow From Webb's Playbook
2012-05-25 03:33:19

NASA's next flagship mission – the James Webb Space Telescope – will carry the largest primary mirror ever deployed. This segmented behemoth will unfold to 21.3 feet in diameter once the observatory reaches its orbit in 2018. A team of scientists at NASA's Goddard Space Flight Center in Greenbelt, Md., now is developing an instrument that would image and characterize planets beyond the solar system possibly from a high-altitude balloon has borrowed a page from the Webb...

Street Lights Affect Delicate Ecosystems
2012-05-24 04:26:42

Brett Smith for RedOrbit.com Civilization has long been derided for intruding upon the habitats of wild animals, and even man´s smaller neighbors have been affected by the wheels of progress. Another measure of this impact can be seen in how street lighting is having a transformative effect on communities of insects and other invertebrates living near them, according to researchers at the University of Exeter in the United Kingdom. A report published in Biology Letters showed...

Astrophysicists Use Three-Telescope Interferometry To Observe How Black Holes Are Fueled
2012-05-18 03:45:33

By combining the light of three powerful infrared telescopes, an international research team has observed the active accretion phase of a supermassive black hole in the center of a galaxy tens of millions of light years away, a method that has yielded an unprecedented amount of data for such observations. The resolution at which they were able to observe this highly luminescent active galactic nucleus (AGN) has given them direct confirmation of how mass accretes onto black holes in centers of...

WISE Catches Cosmic Dust Bunny
2012-04-27 03:13:54

Images from NASA's Wide-field Infrared Survey Explorer (WISE) reveal an old star in the throes of a fiery outburst, spraying the cosmos with dust. The findings offer a rare, real-time look at the process by which stars like our sun seed the universe with building blocks for other stars, planets and even life. The star, catalogued as WISE J180956.27-330500.2, was discovered in images taken during the WISE survey in 2010, the most detailed infrared survey to date of the entire celestial sky....


Latest Observational astronomy Reference Libraries

Astrophysics
2014-01-12 00:00:00

Image Caption: NGC 4414, a typical spiral galaxy in the constellation Coma Berenices, is about 56,000 light-years in diameter and approximately 60 million light-years distant. Credit: NASA/ESA/Wikipedia What is Astrophysics? For much of the modern age the term Astrophysics has been used synonymously with Astronomy. This interchange is so common that many textbooks even offer the two as having the same meaning. However, from a strictly historical perspective there are differences...

45_894c6a813094d5c55029fadb762d4d57
2010-10-08 17:45:24

Radio telescopes, used in tracking and collecting data from satellites and space probes, are a form of directional radio antenna used in radio astronomy. They operate on the radio frequency portion of the electromagnetic spectrum where they detect radio sources. Radio telescopes are large parabolic antennas used singly or in an array and are located far from major centers of population in order to avoid electromagnetic interference. Karl Guthe Jansky built the first radio antenna used to...

0_035f33139a46eac03f7b1ef5a5cd27be
2010-09-24 17:50:57

A telescope, designed to aid the observation of remote objects, collects some form of electromagnetic radiation (such as visible light). The Netherlands developed the first known practical telescope in the 17th century. The term "telescope" was termed in order to describe Galileo's instruments in 1611. However, Galileo was not the inventor of the telescope. It was Hans Lippershey, Zacharias Janssen, and Jacob Metius who are credited with the creation of the telescope. In 1668, Isaac Newton...

45_b90d45a4e7d89d873d39705549e516ce
2014-01-12 00:00:00

Sample Entry: Astronomy is the scientific study of stars, planets, comets, galaxies, and other phenomena that occur outside Earth's atmosphere (e.g. cosmic radiation). Astronomy deals with the evolution, physics, chemical makeup, meteorology, and motion of celestial objects, and also the formation of the universe. The word Astronomy comes from the Greek words astron (meaning "star") and nomos (meaning "law"). Astronomy is one of the oldest sciences. Since the dawn of man, people always...

0_140be4f8b9e91033cecf670093b7e642
2009-04-28 11:47:36

The Reverend Thomas William Webb (December 14, 1807 "“ May 19, 1885) was a British astronomer and faithful clergyman. The lone son of a clergyman, the Rev. John Webb was raised and educated by his father in absence of his mother who died in Webb's early childhood. He travelled to Oxford to attend Magdalen College. Soon after, he was ordained a minister by the Anglican Church in 1829. In 1843, he married Henrietta Montague. Mrs. Webb died on September 7, 1884. Webb followed shortly...

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Word of the Day
cruet
  • A vial or small glass bottle, especially one for holding vinegar, oil, etc.; a caster for liquids.
This word is Middle English in origin, and ultimately comes from the Old French, diminutive of 'crue,' flask.
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