page2rss is a simple, effective RSS scraper. For instance, here's an RSS feed for Astronomy Picture of the Day. A powerful feature: "You can add a button to your browser's bookmarks toolbar that will create Page2RSS feed for the page you are currently viewing."
The Atlantic has an interesting article about the high probability of "space rocks" hitting the earth, possibly as high as a 1 in 10 chance of a major catastrophe each century. Not a new theme, but the article has some new developments suggesting it is more common than once thought. Includes a 10 minute video.
Leave the planet to travel into the largest structures of the universe, then plunge into the tiniest. Forty two orders of magnitude in thirty six minutes.... Cosmic Voyage. (single link Google video via) [more inside]
“Here was an object brand new. At first we didn’t recognize it.” Dr. Alicia Soderberg on the discovery of Supernova 2008D, using the Swift satellite telescope....
Vatican's chief astronomer states that belief in alien life does not conradict faith in God. Fr. José Gabriel Funes, a Jesuit preist and chief astronomer for the Vatican, stated in an interview in L'Osservatore Romano, the Vatican's official newspaper, that, "Just as we consider earthly creatures as 'a brother,' and 'sister,' why should we not talk about an 'extraterrestrial brother'? It would still be part of creation." [more inside]
Microsoft's much anticipated WorldWide Telescope was released today (in the past hour actually). Article in New York Times and TED speech.
" It looks as if our Milky Way will be subsumed into its giant neighbour, the Andromeda galaxy...." A (not so) little trove of images of galactic collisions has been released to mark the 18th anniversary of the Hubble telescope's launch. Gravitic Mayhem. (via)
The Story of a Comet Hunter (see also his web page which contains a link to the story of his discover of Comet Seki-Lines in 1962). Visual comet hunting has a long and intriguing history. Today visual hunters are adapting their ways to make visual discoveries in an age of automated searches. The amateur can still win. Now, ANYONE can discover a comet(?) Or perhaps 1000. A Guide for SOHO Comet Hunters. More SOHO and Sungrazing Comet Links. [Previously]
See Saturn this Saturday April 12 is the second annual International Sidewalk Astronomy Night, a worldwide event coordinated by the Sidewalk Astronomers. The group, founded in 1968 by John Dobson (subject of this documentary), is dedicated to a sort of guerrilla astronomy -- experienced stargeeks bringing their really good telescopes out to places where people are. So even on your way to the bars, the shows, and the honky-tonk you can see stuff like this and this - like these people did.
Many planets have been found circling other stars, but the prevailing search techniques turn up results encouraging but bizarre. (encouraging, previously) Gravitational micro-lensing has made it possible to OGLE a solar system much like our own.... You're not alone.
How far can the naked eye see? About 7.5 billion light-years. On March 19th, a Gamma Ray Burst was noticed by NASA's Swift satellite and given the name GRB 080319B. It left an optical afterglow estimated at +5 apparent magnitude for 30 seconds, about that of an average star. (Sadly, no one was looking at the area with an optical telescope at that exact time.) Read the original Burst Alert, including the email address of the Burst Advocate, here. [more inside]
Jodrell Bank observatory may shut down according to a UK funding proposal (via Bad Astronomy). The observatory is comprised of several radio telescopes including Lovell, the third largest steerable radio telescope in the world. The proposed budget cuts would save the UK £2.5 million per year. Perhaps Lovell can be converted (again) to an outdoor movie screen.
The World at Night is a collection of astrophotography from around the world.
Over 30 years ago, Robert Burnham Jr. struggled to get his astronomical (in more ways than one) three volume work published. Burnham's Celestial Handbook: An Observer's Guide to the Universe Beyond the Solar System "remains a sort of real-life hitchhiker's guide to the galaxy, a compendium with something to say about nearly every cosmic destination worth visiting. . . It is rarely compared to other books because there simply is none other like it." It remains a beloved and relevant book among star-gazers today. Yet few know much about the life of the author, or of his sad and lonely demise: Sky Writer.
Will asteroid 2007 TU24 devastate our planet due to "magnetic reconnection"? Bad Astronomy's Phil Plait doesn't think so.
The images produced by today's ordinary amateur astrophotographer rival those produced by the big observatories only a decade or two ago. (This "Two Comets" image alone is worth a look. <-Rollover for close-ups of the comets.) You can get very good results with far simpler equipment, however - even with "old-fashioned FILM". Looking for the BEST skies for astrophotography? If you aren't a weenie, you might try Dome C, Antarctica. [more inside]
The biggest diamond in the world is insignificant, compared with the biggest diamond in the galaxy. Discovered in 2004, the Center For Astrophysics suggests that you should use the galactic one "to impress your favorite lady." Here's information about how diamonds are formed, and where they are found.
Open Yale Courses provides free and open access to seven introductory courses taught by distinguished teachers and scholars at Yale University:Astronomy, English, Philosophy, Physics, Political Science, Psychology, Religious Studies: a full set of class lectures produced in high-quality video, syllabi, suggested readings, and problem sets. [more inside]
In 1627, Schiller's Coelum Stellatum Christianum attempted to replace the mythical constellation figures with Christian figures. More from the Linda Hall Library Digital Services Unit. Art, illustration, and astronomy aficionados will appreciate the beauty of historic celestial atlas illustrations: Bayer's Uranometria 1603 (also the 1661 Edition), Flamsteed - Fortin Atlas Celeste - 1776 (text intro), Celestial Atlas by Alexander Jamieson. HubbleSource is cleaning up scans from one historic atlas and making them available in web and hi-res versions for use in non-commercial applications. (See also: David Rumsey Map Collection, and the exhibition Out of this World (index & T.O.C.), more Images, Artwork and Historical Objects at the US Naval Observatory. [more inside]
HobbySpace hosts an exhaustive collection of information and links about space-related hobbies, including amateur astronomy, satellite design, and rocketry for both beginners and experts.
Astronomers find a giant hole a billion light years across & located 8 billion light years away from us. They believe it could be evidence of another Universe at the edge of ours.
In addition to his work on the design of the 200-inch Hale telescope, amateur astronomer Russell W. Porter (1871-1949) designed and produced a remarkable, bronze-cast garden telescope in the 1920s. Fewer than 60 of these unusual Newtonian reflectors were ever made, and they're even harder to find now: earlier this year, one went for $18,000 at auction. But a reproduction of the Porter Garden Telescope is now available, for a mere $59,000 (it's cast bronze on a marble pedestal); a local cable station has a profile of the people behind it. Via Sky and Telescope.
Here's an excellent map if you want to see Comet Holmes/17P tonight (the comet that, until a couple of nights ago you would have needed a pretty good-sized telescope to even see. Then (out of the blue, as it were) it unexpectedly brightened by over 1,000,000 times to become an easy object for your naked eye –even with the nearly full moon in the sky). I did not know about CalSky but (despite some less-than-attractive web design) is truly the best of the web for online astronomy info and sky maps! [more inside]
Astronomy Media Player - a generous collection of astronomy podcasts all gathered in one spot.
Using a $20,000 CCD camera and some new software, ground-based telescopes can now get images as good as the Hubble Telescope in many situations [some images ]. By taking many high-quality pictures quickly and taking the best parts of each, Lucky imaging compensates for atmospheric effects to produce lovely images. You can do it too, using free software and any webcam.
Arecibo Observatory, only facility on the planet able to track asteroids with enough precision to tell which ones might plow into Earth is losing funding. NSF has told them to find outside funding for half their budget. Part of the problem? They're in PR, so they have no state senators to fight budget cuts on their behalf. Also facing a crunch, the Very Long Baseline Array (Very Large Array seems ok, money-wise) which stretches from Hawaii to the Virgin Islands.
"Somewhere on the planet are ten-year-olds who, someday, will be the first people to set foot on Mars" 300 scientists and space-experts contributed to what's billed as "a realistic vision of the first Human Mission to Mars" -- Race to Mars. Discovery Channel Canada used Hollywood special effects, but for added realism rather than ray-guns and aliens. On the website, you can argue about whether they got it right. www.racetomars.ca
Not content to merely index all things terrestrial, Google Earth now lets you set your sights on the sky.
Time lapse animations of planets and satellites. See what an amateur digital astrophotographer could do a decade ago. This is what the animated gif was designed to do.
B. H. May, CBE, as an astronomy student at Imperial College London co-authored two papers, MgI Emission in the Night Sky Spectrum and An Investigation of the Motion of Zodiacal Dust Particles (pdf) and was on the way to completing his doctorate when he dropped out to form a band. After a 36-year break May went back to school to get his PhD. Last year he co-authored Bang! the Complete History of the Universe. This year he is finishing up his thesis-"Radial Velocities in the Zodiacal Dust Cloud" and this week is in La Palma finishing spectographic observations. Mr May also plays guitar.
Learn to navigate using the stars in 15 minutes! OK, well maybe not navigate, but you'll know exactly where Orion, Betelgeuse, Polaris (the North Star), Cassiopeia, and Jupiter are.
The GTC (Great Telescope Canaries) sees first light today. Apart from the sheer size (10.4 m) of its mirror and from the science it will deliver, the GTC is remarkable by its location at the Roque de los Muchachos Observatory 2426 m high at the rim of the Caldera de Taburiente in the island of La Palma. La Palma is also, for a number of reasons, also interesting for geologists. In that regard, it made headlines a couple of years back due to a paper about the risk of a collapse of the island which could cause a devastating tsunami. Oh, and it's also a really nice place for a holiday.
A team of astronomers needs your help. It's not terribly easy to get computers to distinguish between galaxy shapes, but fortunately humans are not only very good at it, but seem to actually enjoy gazing out in to space. So, go to galaxyzoo.org, look at a few pretty pictures from the Sloan Digital Sky Survey , and help classify millions of galaxies and aid research in to how they form and evolve while you're at it.
Mars and Beyond - 50 years ago, this animated episode of Tomorrowland aired on Disneyland a few months after the launch of Sputnik - an entertaining melange of astronomy, sci-fi, pop culture, science, speculation, and surreality. Walt himself and Wernher von Braun make guest appearances and clip 5 is particularly trippy. (Parts 2, 3, 4, 5, 6)
Happy Blue Moon! A dear friend IM'd me today, and told me it was blue moon... which was funny, because we had just been talking about it the day before — oblivious of tonight's occurance. Don't know what a blue moon is? Well, wikipedia has the answer, of course... In the mood for a little music? Well, you can always download the The Marcels classic or just sing the song yourself with a little help... or throw caution to the wind, and listen to Pink Moon instead.
Scientists have discovered a planet composed of scorching hot ice. Originally thought to be a gas giant due to its mass, its actually only four times the size of Earth and most likely composed of exotic forms of ice, such as Ice VII and Ice X with s surface temperature of 300° C.
UniverseNewsFilter: Scientists claim to have detected dark matter! Here are NASA's press release, feature page and multimedia presentation. For an explanation what dark matter is, I refer you to this page. After all that excitement, you can sit down and work out how much dark matter is in the Milky Way.
Under alien skies: Start with the simply stunning Exosolar, a flash-based interface for navigating through 2,000 nearer stars in 3-D, including all discovered planets outside our solar system. See what the skies would look like from other planets and suns. Explore star maps from many science fiction universes, from Star Trek to Dune. Watch the Big Dipper change its shape over a hundred thousand years. Zoom into a face-on map of the Milky Way that would cover 16 square meters if printed, and see the Atlas of the Universe. [prev. on extrasolar planets, prev. on star maps]
Solstice/equinox calculations Been hankering to build your own Stonehenge but got stumped at the planning stage? Paul Doherty shows you the math to construct a modern ancient observatory with angles and facings correct for your latitude.
To celebrate the 17th birthday of the Hubble Space Telescope, please feast your eyes on a very detailed (Flash) picture of the Carina Nebula.
The first was found just fifteen years ago, after centuries of speculation. As of today, we're up to 227 and counting. Most are just wobbles in data, but we have pictures and exotica too. And we are looking for more (although some think we shouldn't look very hard and others are drawing some surprising conclusions). The science and technology of finding the most fascinating and elusive types demands some of the cleverest engineering, yet you can even have a go for yourself. Previously on Metafilter
Prominent cosmologist Simon D.M. White has written a provocative paper posted to the astrophysics arxiv complaining that too much time is being devoted to the quest to understand the nature of the elusive dark energy: "Dark Energy is undeniably an interesting problem to attack through astronomical observation, but it is one of many and not necessarily the one where significant progress is most likely to follow a major investment of resources." He worries generally that observational cosmology/astrophysics/astronomy may turn away from the construction of instruments of general utility (such as the Hubble Space Telescope), to concentrate on a small number of massive experiments narrowly focused on solving particular problems (such as WMAP and the Large Hadron Collider), to the detriment of the "quirky small-science" type of astronomy.
This Saturday, April 21, 2007, is Astronomy Day 2007. This annual promotion of astronomy started in California (pdf) in 1973 and has since spread around the country and the world. Science museums and observatories all over are hosting special events to celebrate Astronomy Day. Find a local club near you and start enjoying the night sky!
It's like Google Maps...for space. Wikisky is a draggable, zoomable, web-based star map. And if you click on a star or other object, it brings up a page with all the information you could want on it, including recent articles and astrophotos that contain that object. And it does lots more. Go explore.
Titan Sea and Lake Superior
This movie, comprised of several detailed images taken by Cassini's radar instrument, shows bodies of liquid near Titan's north pole. These images show that many of the features commonly associated with lakes on Earth, such as islands, bays, inlets and channels, are also present on this cold Saturnian moon. They offer strong evidence that larger bodies seen in infrared images are, in fact, seas. These seas are most likely liquid methane and ethane.Radar Shows Evidence of Seas