Forget Black Holes, How Do You Find A Wormhole?

Finding a black hole is an easy task… compared with searching for a wormhole. Suspected black holes have a massive gravitational effect on planets, stars and even galaxies, generating radiation, producing jets and accretion disks. Black holes will even bend light through gravitational lensing. Now, try finding a wormhole… Any ideas? Well, a Russian researcher thinks he has found an answer, but a highly sensitive radio telescope plus a truckload of patience (I’d imagine) is needed to find a special wormhole signature…

A wormhole connecting two points within spacetime.
Wormholes are a valid consequence of Einstein’s general relativity view on the universe. A wormhole, in theory, acts as a shortcut or tunnel through space and time. There are several versions on the same theme (i.e. wormholes may link different universes; they may link the two separate locations in the same universe; they may even link black and white holes together), but the physics is similar, wormholes create a link two locations in space-time, bypassing normal three dimensional travel through space. Also, it is theorized, that matter can travel through some wormholes fuelling sci-fi stories like in the film Stargate or Star Trek: Deep Space Nine. If wormholes do exist however, it is highly unlikely that you’ll find a handy key to open the mouth of a wormhole in your back yard, they are likely to be very elusive and you’ll probably need some specialist equipment to travel through them (although this will be virtually impossible).

Alexander Shatskiy, from the Lebedev Physical Institute in Moscow, has an idea how these wormholes may be observed. For a start, they can be distinguished from black holes, as wormhole mouths do not have an event horizon. Secondly, if matter could possibly travel through wormholes, light certainly can, but the light emitted will have a characteristic angular intensity distribution. If we were viewing a wormhole’s mouth, we would be witness to a circle, resembling a bubble, with intense light radiating from the inside “rim”. Looking toward the center, we would notice the light sharply dim. At the center we would notice no light, but we would see right through the mouth of the wormhole and see stars (from our side of the universe) shining straight through.

For the possibility to observe the wormhole mouth, sufficiently advanced radio interferometers would be required to look deep into the extreme environments of galactic cores to distinguish this exotic cosmic ghost from its black hole counterpart.

However, just because wormholes are possible does not mean they do exist. They could simply be the mathematical leftovers of general relativity. And even if they do exist, they are likely to be highly unstable, so any possibility of traveling through time and space will be short lived. Besides, the radiation passing through will be extremely blueshifted, so expect to burn up very quickly. Don’t pack your bags quite yet…

Source: arXiv publication

Flying Telescope Passes Its First Stage of Tests

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Telescopes on the ground – while having all sorts of good qualities – have the disadvantage of peering through the whole of the atmosphere when looking at the stars. Space-based telescopes like Hubble are an effective way around this, but launching a telescope into space and maintaining it is not exactly cheap. What about something in between the two?

This is where SOFIA (Stratospheric Observatory for Infrared Astronomy) flies in. SOFIA is a converted 747SP airliner that used to carry passengers for United Airlines and Pan Am, but now only has one voyager: an infrared telescope.

SOFIA recently completed the first phase of flight tests to determine its structural integrity, aerodynamics and handling abilities. This first series of tests were done with the door through which the telescope will peer closed, and open-door testing will begin in late 2008.

What makes SOFIA valuable is its ability to fly high in the stratosphere for observations, at around 41,000 feet (12.5km). This eliminates the atmosphere in between the ground and space, which causes turbulence in the light coming through, and also absorbs almost completely some wavelengths of infrared light.

Cloudy nights, normally the bane of observational astronomy, will not impede the ability of SOFIA. Other advantages are that scientists will be able to add specialized observing instruments for specific observations, and fly to anywhere in the world.

The telescope is 10 feet across, and weighs around 19 tons. It will look through a 16-foot high door in the fuselage to study planetary atmospheres, star formation and comets in the infrared spectrum.

During this stage of testing, the ability of the telescope to compensate for the motion and vibrations of the airplane was checked. After the first open-door tests are run this year, the mobile observatory will begin making observations in 2009, and will be completely operational in 2014.

SOFIA is a cooperation between NASA, who will maintain the plane, and the German Aerospace Center, who built and will maintain the telescope.

Source: NASA Press Release

Meteor Shower Throws Over 100 Meteors per Hour

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With over 100 meteors per hour, the Quadrantid Meteor Shower is one of the latest mergers between Google and NASA, a major asset to space research due to their successful combination of ideas and plans. This peak shower began around 0200 UTC on Friday morning, January 4th, with the jet owned by the founders of Mountain View-based Google flying amongst big science players, such as the SETI research team.

To see this spectacular sight and to partake in a scientific mission, Google carried a team of NASA scientists and their high-technology instruments on board the Google owned Gulfstream V jet, which left the Mineta San Jose International Airport on Thursday late afternoon about 4:30 p.m. Plans were made for a ten-hour flight over the Arctic, returning to home base when the meteor shower mission was accomplished with the resulting data.

The GOOG Google.com Stock Message Board is full of the things that Google has been doing to improve the world—a real biggie was to develop a cheaper solar, wind power for Earth—excellent idea from a company whose corporate motto is to “do not be evil.â€? That plan involved the creation of a research group to develop energy sources that was a cheaper renewable alternative which focuses on solar, wind and any other forms of power through the Renewable Energy “Cheaper Than Coalâ€? project. And of course, lowering Google’s power bill was top of the list before anyone else as a huge incentive.

Last September, as most are aware of, NASA and Google had launched a $2.6 million dollar agreement to let the Google co-founders house their aircraft at Moffett Field while NASA was to be allowed to use it for their science work, such as that of the Quadrantid Meteor Shower. Other prospective plans for Google are to hand out $30 million dollars to any company that successfully comes up with a plan to bring people to the moon. Another plan is to fund a space race through Google’s Lunar X Prize competition.

Original Source: NASA News Release

Perseus, Hero of the Night

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With the Moon quickly departing early evening skies, now is the time to find a hero. Thanks to attention Comet 17/P Holmes has generated, many SkyWatchers have now become familiar with the constellation Perseus, but there’s a lot more there than just a comet! Only a few days ago, Holmes passed a wonderful bright star named Mirfak – a part of the Alpha Persei Association. Viewable with the unaided eye, but best in binoculars, this young, moving cluster is also known as Melotte 20 or Collinder 39 and is around 601 light years away. What a treat to catch a comet overlaying a star cluster!

But that’s not all… As the old year ends and a new one begins, Comet Holmes will sweep round to visit with Messier 34. At a little fainter than magnitude 5, you might be able to spot this 1400 light year distant star cluster as a hazy patch with just your eyes, but its full-moon size will make it a special treat in binoculars as Holmes passes it by!

As Comet Holmes continues to spread and dim, it will round its orbital turn and head towards a great variable star – Beta Persei. For readers, the “Demon Star” – Algol – is a familiar target, but what a treat to catch this eclipsing variable with the the comet by the last week of January 2008! Keep watching this 93 light year distant star, because as regular as clockwork – every 2.867 days – it will drop from magnitude 2.1 to magnitude 3.4 in matter of hours. To calculate Algol’s changes for yourself, try using this great interactive tool provided by Sky & Telescope: The Minima Of Algol. How fun to watch an eclipse that happens on such a regular basis!

But don’t stop watching just yet! While the comet will probably dim to telescope only range by mid-February, it’s going to slide its way past NGC 1342! This small, compressed, open cluster of stars is around 6.5 magnitude and well within binocular and small telescope range. Still not enough? Then hang on as Holmes continues takes a run for the west coast and slides by NGC 1499 – the “California Nebula” around the first week of March! If you’re able to view under very dark skies, the California Nebula can be seen unaided and in binoculars, but its low surface brightness makes it tough for a
telescope. What a great opportunity for astrophotographers!

Isn’t it time to make Perseus your hero?