City Block Size Asteroid Comes Near-Earth To Oblate Spheroid

The asteroid, which is 10 times the size of an Olympic swimming pool, is one of 9,000 "near-Earth objects" recorded by Nasa. It will not be visible to the naked eye but stargazers can watch a live broadcast and catch a glimpse of it passing by Earth online. Named LZ1, the asteroid is 500m (1,650ft) wide and is likely to get only within 14 times the moon's distance from Earth. Image Credit: The Telegraph

City Block Size Asteroid Comes Near-Earth To Oblate Spheroid

An asteroid the size of a city block discovered by astronomers in Canberra will zoom past Earth but poses no risk of a collision.

The "unusually large" asteroid will not be visible to the naked eye but asteroid enthusiasts may watch it pass by during a live online broadcast, said Patrick Paolucci, president of the skywatchers' site, Slooh.

NASA has already cataloged 9000 such Near-Earth Objects, but astronomers are always on the lookout for new ones.

"Once in awhile one will come out of nowhere like this one, which is actually pretty big," Paolucci told AFP.

"We were like, 'Wow, we should track this one."'

The asteroid, named 2012 LZ1, is thought to be about 500 metres wide, and is expected to pass within 14 times the Moon's distance from the Earth.

The massive object was discovered just days ago by Scottish-Australian astronomer Rob McNaught and colleagues at the Research School of Astronomy and Astrophysics of the Australian National University.

The asteroid qualifies as a Near-Earth Object because of its size and proximity - more than 152 metres wide and within a distance of 7.5 million kilometres from Earth.

Paolucci said the asteroid's fly-by would be covered in real-time with footage from an observatory in the Canary Islands at Slooh.com beginning at 10am (AEST) on Friday.
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Graphic Searches Expand From The Earth To Include Heavens

Google Earth, Andromeda Galaxy - This tool isn't limited to stars. There are images of galaxies, clusters, stellar winds and more. Image Credit: Businesswire

Graphic Searches Expand From The Earth To Include Heavens

A couple of years ago, the ability to search the surface of the Earth with a graphic window was introduced and became all the rage. One could ask the search tool to take them to a particular location and up would pop a satellite photographic view of that specific place here on the Oblate Spheroid. If the location was a home address or business, the photo even detailed the cars that might have been parked around the area when the photo was taken. Amazing.

This last week, one of the more popular of these search tools, Google Earth, introduced a version that allows one to escape the confines of this little orb and explore the heavens around us. For additional graphic information on a particular object (planet, star, galaxy) this tool utilizes images captured by the Hubble telescope. This, along with search tools offered through other web portals, is a great way to introduce oneself and explore the worlds outside of this world!

Item from Webware Weekley -

A brief guide to the heavens on your PC: Google Earth and more
By Rafe Needleman – August 22, 2007, 2:32 PM PDT

Google just launched a new version of Google Earth (news, download) from which you gaze up from the surface of the planet, not just down on it. It's a good way to see which stars and planets are over your home, right now. You can also check out a rich database of Hubble Space Telescope images that is overlaid on the celestial map.

The new Google Earth has a lot of additional education and reference material linked to it, pulled in from the Net as needed. The program is a great way to learn about the night sky. It has two big limitations, though: your point of view is limited to Earth (you can't see the stars from other locations) and you have an extremely limited control of time. If you want to see where the planets were on your birthday, for example, you can't.

Getting to Google Sky was a little confusing, but it's actually an icon right in the middle of the page (circled). The first screen shows constellations to make it easier to find what you're looking for. With your mouse you can rotate 360 degrees around the sky and can also zoom in and out with your scroll wheel. Image Credit: Google Earth via CNET

When you find a highlighted star, nebula or galaxy, you can zoom in. The diamond shape indicates more information is available. The Orion Nebula is located in the Orion galaxy--it's the hunter's weapon. Image Credit: Google Earth via CNET

Many stars, galaxies or interstellar phenomenon contain pictures and information--some directly from the Hubble site. Image Credit: Google Earth via CNET

If your curiosity about the universe bumps into Google Earth's edges, I'd recommend also checking out these two applications:

Celestia (download) is a 3D simulation of the galaxy. Its special power is not its imagery (Google's is better, although Celestia does a good job with planets and asteroids in our solar system), but rather that you can zoom in on any object in the program's database and see the galaxy from that perspective. You can also see the position of stars at any point in time and can control the rate of time's passage to see how objects move over the millennia.

Stellarium (download) is a gorgeous planetarium for your computer. Its sky and star visuals are a lot more compelling then either Google's or Celestia's, although Stellarium does not have detailed Hubble overlays. Like Google, it's Earth-bound (you can't move your point of reference), but like Celestia, it gives you good control over time so you can see the heavens wheel about. My favorite feature is that it will also overlay constellation lines from other cultures (Chinese, Inuit, and so on); Google only shows the Western constellations.

There are also Web-based online planetaria. They have good data, but they don't give you the smooth visual controls that the downloadable applications do. See Sky-map.org, WikiSky (review), and YourSky. You can control a powerful stargazing telescope yourself via the Web at the pay site Slooh (review). There are also astronomy gadgets covered over on our gadget blog, Crave.

Finally, if the real galaxy doesn't appeal to you, check out the collaborative work of fiction called Galaxiki. Be advised that it was named one of the "Five stupidest start-ups of the summer" by Valleywag.
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