Universe Today » Observatories

ALMA Telescope Makes First Observations

Nancy Atkinson — Wed, 18 Nov 2009 02:05:02 +0000

The ALMA telescope located high in the Chilean Andes made its first measurements on Tuesday using just two of the eventual 66 antennas that will comprise the array. The Atacama Large Millimeter/submillimeter Array took interferometric measurements of radio signals, or "fringes," from a distant quasar (3C454.3) at sub-millimeter wavelengths. Astronomers said the data from the two 12-meter antennas provided unprecedented sensitivity and resolution, and observations at a wavelength of less than 1mm showed ALMA was now truly a "submillimeter" as well as millimeter-wave telescope.
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Astronomers Find Type Ia Supernova Just Waiting to Happen

Nancy Atkinson — Tue, 17 Nov 2009 15:17:09 +0000

Type Ia supernovae are a mystery because no one can predict when or where one might occur. But astronomers are hedging their bets on V445 Puppis. A so-called "vampire white dwarf" that underwent a nova outburst after gulping down part of its companion’s matter in 2000, now, it appears this double star system is a prime candidate for exploding. “Whether V445 Puppis will eventually explode as a supernova, or if the current nova outburst has pre-empted that pathway by ejecting too much matter back into space is still unclear,” said Patrick Woudt, from the University of Cape Town and lead author of the paper reporting the results. “But we have here a pretty good suspect for a future Type Ia supernova!”
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Post tags: type 1a supernova, white dwarf star

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35 Radio Observatories Link to Break Record

Nicholos Wethington — Tue, 17 Nov 2009 03:00:21 +0000

Ever wondered what the largest telescope on the Earth is? Well, this coming Wednesday and Thursday of this week, the largest telescope ever assembled here will take observations for a whole day. How big is the telescope? About the size of the whole Earth! 35 radio telescopes on 7 continents will link together for one whole day in an effort to observe distant quasars as part of an initiative to improve the reference frame that scientists use to measure positions in the sky.(...)
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A Very Large 3-D Movie

Nancy Atkinson — Tue, 13 Oct 2009 21:39:03 +0000

Quick! Grab a pair of red and green 3-D glasses and slap them on to watch this great time lapse video of the Very Large Telescope at the Paranal Observatory, high in the Atacama Desert in Chile. It shows a complete night at the observatory, and you can see the four 8m telescopes and the four 1.8m telescopes of the VLT working, all in 3-D. The video comes from the handiwork of astrophotographer and head Optics Engineer on the VLT, Stéphane Guisard. If that name sounds familiar, Stéphane has recently been working with ESO and fellow astrophotographer Serge Brunier on the GigaGalaxy Zoom project. Click this link to go directly to GigaGalaxy Zoom, or read one of our previous articles about them here. It was made by using two cameras taking pictures simultaneously, which were combined to create an anaglyph time lapse movie. Two notes about the movie: the telescopes and domes were lit by the moonlight, and the International Space Station crosses the sky during the very first seconds of the movie.
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Sky Scouting Out Astronomy Fun!

Tammy Plotner — Thu, 24 Sep 2009 13:31:27 +0000

What happens when you mix a large group of kids with a telescope that talks? Chances are, you've got a recipe for loads of astronomy fun. Thanks to a generous donation of a Celestron SkyScout 90 telescope and more, the Outreach Team at Warren Rupp Observatory soon found out what it was like to take on more than 300 guests during a recent public night and just how valuable certain pieces of astronomy education equipment can be. Come on inside where it's dark and let me show you what we've found… (...)
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Satellite Images of California Wildfires, Mt. Wilson Update

Nancy Atkinson — Tue, 01 Sep 2009 21:47:33 +0000

NASA's Aqua Satellite MODIS Instrument view of the California wildfires. Credit: NASA

The wildfires near Los Angeles have spread to over 100,000 acres. The Los Angeles Times reported that the fire had burned 74 structures and remained out of control, spreading both west and north. As of 6:30 p.m. Pacific Daylight Time on August 31, some 12,000 homes were threatened. Fire fighters struggled to save the Mt. Wilson Observatory from the encroaching fire. Today, fire fighters set controlled backfires in effort to remove the closest vegetation to the various telescope structures. See below for a labeled image of the structures on Mt. Wilson amid smoke from the fires, courtesy of Emily Lakdawalla of the Planetary Society, along with more satellite, ground and helicopter images from the fires.
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Astronomers Find World’s Best Observing Site

Brian Ventrudo — Mon, 31 Aug 2009 18:26:24 +0000

Image of the Chinese Kunlun base, near "Ridge A"

The search for the best observatory site in the world has lead to the discovery of what is thought to be the coldest, driest, calmest place on Earth. No human is thought to have ever been there, but it’s expected to yield images of the heavens three times sharper than any ever taken from the ground.

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Herschel Telescope First Light Images Released

Nancy Atkinson — Fri, 10 Jul 2009 14:51:23 +0000

Herschel "first light" images of M66 and M74. Credits: ESA and the SPIRE Consortium

The Herschel telescope has now turned on all its instruments, taking a few "first light" images with each instrument of galaxies, star-forming regions and dying stars. Herschel astronomers said they were "staggered" by the results, saying "these observations show that Herschel’s instruments are working beyond expectations. They promise a mission of rich discoveries for waiting astronomers." Above are images taken with Herschel’s Spectral and Photometric Imaging Receiver (SPIRE, of two galaxies, M66 and M74. The galaxies showed up prominently, providing astronomers with their best images yet at these wavelengths. And what's that in the background? Other more distant galaxies!
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A Top-Secret Explosion in M82

Nancy Atkinson — Wed, 27 May 2009 12:56:08 +0000

M82. The VLA image (top left) clearly shows the supernova (SN 2008iz). Credit: MPIfR

Supernovae are extremely luminous explosions of stars and cause bursts of radiation that often outshine an entire galaxy. So, when a supernova exploded last year in a nearby galaxy, why didn't we see it? Was this an undercover supernova; a top-secret, covert event? Well, kind of. The secret is in the dust.
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Caltech Observatory Dismantled So Others Can Rise

Anne Minard — Sun, 10 May 2009 14:07:41 +0000

Caltech has announced it will begin decommissioning the Caltech Submillimeter Observatory (CSO) in Hawaii starting in 2016.

Caltech says the 23-year-old telescope is being replaced by the next generation of radio telescope, the Cornell Caltech Atacama Telescope (CCAT), to be located in Chile.

"The timing of this works very nicely," says Tom Phillips, director of the CSO and Altair Professor of Physics in Caltech's Division of Physics, Mathematics and Astronomy. "The international community of astronomers that rely on CSO will have a seamless transition as CCAT comes online just as CSO is decommissioned."

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Herschel and Planck Set to Launch on May 14

Nancy Atkinson — Wed, 29 Apr 2009 00:13:59 +0000

The Herschel and Planck spacecraft. Credit: ESA

The European Space Agency announced today that the Herschel and Planck spacecraft will now launch on May 14. Liftoff had been delayed to allow time for additional checks on the Ariane 5 ECA launch vehicle. The two spacecraft are launching together in what was originally a cost saving move, but the complexity of preparing two spacecraft at once has caused frequent delays and cost overruns. However, now that the launch is near, hopefully the cutting-edge technologies included in both spacecraft will soon pay off in new discoveries astronomy and cosmology.
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Next-Generation Telescope Gets Team

Anne Minard — Sun, 08 Feb 2009 02:26:58 +0000

Astronomy organizations in the United States, Australia and Korea have signed on to build the largest ground-based telescope in the world – unless another team gets there first. The Giant Magellan Telescope, or GMT, will have the resolving power of a single 24.5-meter (80-foot) primary mirror, which will make it three times more powerful than any of the Earth's existing ground-based optical telescopes. Its domestic partners include the Carnegie Institution for Science, Harvard University, the Smithsonian Institution, Texas A & M University, the University of Arizona, and the University of Texas at Austin. Although the telescope has been in the works since 2003, the formal collaboration was announced Friday.
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Astronomers 'Time Travel' to 16th Century Supernova

Nancy Atkinson — Wed, 03 Dec 2008 18:35:00 +0000

On November 11, 1572 Danish astronomer Tycho Brahe and other skywatchers observed what they thought was a new star. A bright object appeared in the constellation Cassiopeia, outshining even Venus, and it stayed there for several months until it faded from view. What Brahe actually saw was a supernova, a rare event where the violent death of a star sends out an extremely bright outburst of light and energy. The remains of this event can still be seen today as Tycho’s supernova remnant. Recently, a group of astronomers used the Subaru Telescope to attempt a type of time travel by observing the same light that Brahe saw back in the 16th century. They looked at 'light echoes' from the event in an effort to learn more about the ancient supernova.
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Holiday Glitter With Omega Centauri

Nancy Atkinson — Tue, 02 Dec 2008 20:54:51 +0000

Omega Centauri. Credit: ESO

A new image of Omega Centauri shows the globular cluster glittering away as one of the finest jewels of the southern hemisphere night sky. It contains millions of stars and is located about 17,000 light-years from Earth in the constellation of Centaurus, and sparkles at magnitude 3.7, appearing nearly as large as the full moon on the southern night sky. Visible with the unaided eye from a clear, dark observing site, when seen through even a modest amateur telescope, the Omega Centauri can be seen as incredible, densely packed sphere of glittering stars. But when astronomers use a professional telescopes, they are able to uncover amazing secrets of this beautiful globular cluster.
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Sources of Earth-Bombarding Cosmic Rays May Have Been Located

Nancy Atkinson — Mon, 24 Nov 2008 20:19:07 +0000

Last week's announcement of a puzzling and unknown source of high energy cosmic rays bombarding the Earth is now joined by another discovery of two sources of unexpected cosmic rays from nearby regions of space. A Los Alamos National Laboratory cosmic-ray observatory has seen for the first time two distinct hot spots that appear to be bombarding Earth with an excess of cosmic rays. "These two results may be due to the same, or different, astrophysical phenomenon, said Jordan Goodman, principal investigator for the Milagro observatory, commenting on last week's announcement by the ATIC experiment and the new discovery by his team. "However, they both suggest the presence of high-energy particle acceleration in the vicinity of the earth. Our new findings point to general locations for the localized excesses of cosmic-ray protons." The cosmic rays appear to originate from an area in the sky near the constellation Orion.
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Asteroseismology: Observing Stars Vibrate with CoRoT

Ian O'Neill — Thu, 23 Oct 2008 22:36:45 +0000

Observing a stars brightness pulsate may reveal its internal structure say researchers using the Convection Rotation and Planetary Transits (CoRoT) observatory. The highly sensitive orbital telescope can detect tiny variations in a distant star's brightness, leading astronomers into a new field of stellar seismology called "asteroseismology."

Seismology is more commonly used by scientists on Earth to see how waves travel through the terrestrial crust, thereby revealing the structure of the material below us. Even solar physicists use the method of helioseismology to understand the interior of our Sun by observing its wobble. Now, by observing the slight changes in stellar brightness, it is possible to remotely probe deep into the inner workings of a distant star…
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Feeding Time at the Stellar Zoo: Infant Stars Generate Lots of Gas

Ian O'Neill — Thu, 16 Oct 2008 01:40:18 +0000

Understanding how stars form is critical to astronomers. If we can gain a better understanding of how intermediate-size infant stars grow, we can begin to answer some of the most perplexing questions hanging over the evolution of our own Solar System. Unfortunately, the nearest star forming regions are about 500 light years away, meaning that astronomers cannot simply use traditional optical telescopes to peer into star-forming disks of gas and dust. So, researchers working with the European Southern Observatory (ESO) are combining high resolution spectroscopic and interferometry observations to give the most detailed view yet of infant stars eating away at their proto-planetary disk, blasting out violent stellar winds as they do so…
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Astrophysicist's South Pole Death Remains a Mystery After Eight Years

Ian O'Neill — Fri, 26 Sep 2008 19:22:12 +0000

In May 2000, Australian astrophysicist Dr Rodney David Marks died from acute methanol poisoning whilst stationed at the US Amundsen-Scott South Pole Station. He was a 32 year old "brilliant and witty" scientist, whose death shocked his family and friends. The media jumped on this story, citing the tragedy as the "first South Pole murder," but there was little evidence to suggest anyone else was involved. Unfortunately it appears that New Zealand investigators have been hampered by a lack of co-operation by the organizations that run the facility, so it remains unclear whether Marks' death was the result of foul play or tragic accident…
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The Cepheids Aren't Falling

Nancy Atkinson — Fri, 19 Sep 2008 21:02:43 +0000

Cepheid variable stars have been used for years as a way to determine distance to other galaxies. The correlation between their period of variability and absolute luminosity provides a cosmic yardstick to measure distances out to a few tens of millions of light-years. Additionally, Cepheids closer to home are used as tools to investigate how the Milky Way spins. But the motion of the Cepheids in our galaxy has confused astronomers, as these neighborhood Cepheids appear to fall towards the sun. A debate has raged for decades as to whether this phenomenon was truly related to the actual motion of the Cepheids and, consequently, to a complicated rotating pattern of our galaxy, or if it was the result of effects within the atmospheres of the Cepheids. But new observations with the HARPS (High Accuracy Radio Velocity Planet Searcher) spectograph shows that the Cepheids aren't falling, and that the much debated, apparent 'fall' does in fact stem from properties of the atmospheres around these variable stars.
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Australian Telescope Leads the World In Astronomy Research

Tammy Plotner — Thu, 11 Sep 2008 16:43:46 +0000

The AAT - Photograph courtesy of Chris McCowage

While the Anglo-Australian Telescope is far from being the world's largest, or even located in the world's best observing site, it's still the world's most productive in terms of astronomy research. According to recently released productivity ratings, the number of scientific papers resulting from observations made with the AAOmega fibre-fed optical spectrograph, SPIRAL Integral Field Unit, IRIS2, University College London Echelle Spectrograph (UCLES), or Ultra High Resolution Facility (UHRF) made the AAT the number one ranked 4-metre-class telescope in the world for more than two years between 2001 and 2003. But what's going on today is even more important… (...)
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'Laser Comb' To Measure the Accelerating Universe

Nancy Atkinson — Mon, 08 Sep 2008 22:34:35 +0000

Back in April, UT published an article about using a device called a 'laser comb' to search for Earth-like planets. But astronomers also hope to use the device to search for dark energy in an ambitious project that would measure the velocities of distant galaxies and quasars over a 20-year period. This would let astronomers test Einstein's theory of general relativity and the nature of the mysterious dark energy. The device uses femto-second (one millionth of one billionth of a second) pulses of laser light coupled with an atomic clock to provide a precise standard for measuring wavelengths of light. Also known as an â€œastro-comb,â€ these devices should give astronomers the ability to use the Doppler shift method with incredible precision to measure spectral lines of starlight up to 60 times greater than any current high-tech method. Astronomers have been testing the device, and hope to use one in conjunction with the new Extremely Large Telescope which is being designed by ESO, the European Southern Observatory.
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New Eye to the Universe Under Construction

Nancy Atkinson — Tue, 02 Sep 2008 16:44:19 +0000

The LSST, or the Large Synoptic Survey Telescope is a large survey telescope being constructed in northern Chile. When operational in 2015, it will be the widest, fastest, deepest eye of the new digital age, providing timelapse digital imaging across the entire night sky every three days, mapping the structure of our dynamic universe in three dimensions and exploring the nature of dark matter and dark energy. LSST hit a major milestone in its construction when the primary mirror blank was recently created. Project astronomers say the single-piece primary and tertiary mirror blank cast for the LSST is "perfect."
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How Far Would You Go For Dark Skies?

Tammy Plotner — Fri, 29 Aug 2008 16:21:55 +0000

Arkaroola Wilderness Sanctuary - MROITF Mount Spriggina

In the age of global light pollution, one thing both amateur and professional astronomers have in common is the need for clear, dark skies. While almost all of us are aware of the impact of light pollution when it comes to pure observing, the "light factor" plays a far more serious role when it comes to astronomical studies. But, there's far deeper reasons for observatories to become increasingly remote. (...)
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GLAST is Now Fermi

Nancy Atkinson — Tue, 26 Aug 2008 20:09:14 +0000

With "first light" successfully observed by the Gamma Ray Large Area Space Telescope, or GLAST, as it has been called until now, NASA has christened the space observatory with its new official name: The Fermi Gamma Ray Space Telescope. Named for Italian physicist Enrico Fermi, the telescope will delve into the mysteries of the high energy end of the electromagnetic spectrum. This new space telescope will try to determine what the mysterious dark matter is composed of, how black holes emit immense jets of material to nearly the speed of light, and help crack the mysteries of solar flares, cosmic rays and the power explosions called gamma ray bursts. At a news conference today to announce the new name and first light observations, Steve Ritz, Project Scientist for the telescope said scientists world-wide are very excited about the telescope's breakthrough capability. "GLAST has great discovery potential. We're expecting surprises," he said.
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XMM-Newton Discovers Strange-Shaped Supernova Remnant

Ian O'Neill — Wed, 11 Jun 2008 23:20:32 +0000

XMM-Newton has just released this beautiful image of a supernova remnant and its companion neutron star. To be more accurate, it didn't "discover" the object, remnant G350.1-0.3 had previously been mistaken to be a distant galaxy. The X-ray observatory has reclassified the object as a Milky Way binary system with one neutron star and the remnant of a young supernova. A wonderful tale about mistaken identity and re-opening a cosmic cold-case, a thousand years after the event…
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