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Domain: astronomy.net

Stories and comments across the archive that link to astronomy.net.

Comments · 8

  1. Re:The paradox by tsjaikdus · · Score: 2, Interesting · on The Fermi Paradox is Back

    True. Our EM leakage is not decipherable beyond Pluto. For an outsider far away, we're just some star with a tiny tiny tiny amount of added noise in the radio spectrum. See http://sciastro.astronomy.net/sci.astro.6.FAQ

  2. Re:Why did they wait so long? by ericpi · · Score: 1 · on Apple Sued over Tiger, Injunction Sought

    I agree with your point, but the math needs work: 26! x 26! x 26! x 26! x 26! is a *huge* number-- around 10^133. (More than the number of particles in the universe).

    The actual number of combinations of 5 letter words is 26^5, about 10 million.

  3. I was going to ask a dumb question, but... by benjamindees · · Score: 4, Informative · on Austrian Physicists 'Teleport' Light Over 600m

    I decided to do a little googling instead:
    How this relates to quantum computing:
    When a single photon is split by a beam splitter, its two `halves' can entangle two distant atoms into an EPR pair.

    How to entangle a photon pair: There are certain nonlinear (BBO) crystals, such as are used in optical parametric oscillators, that will supply entangles photon pairs.

  4. Re:Electrons? by Anonymous Coward · · Score: 2, Informative · on Dark Matter's Profile Discovered?

    Some references...astronomy.net and the referred to article

  5. Re:post processing? by Liem+Bahneman · · Score: 2, Informative · on Close Mars Means Close-Up Pictures
    I use Registax for this. It does stacking, aligning and wavelet processing. The best out there at the moment. A few years back AstroStack was king. There are a bunch of others as well...

    I took >A HREF="http://wastelands-observatory.factspot.com/p rocessed/08262003/">some pictures of Mars last night with my 8" SCT (Schmidt-Cassegrain) and a $30 Vesta Pro web camera and the results aren't too bad. Each image is comprised of 200 stacked images. The seeing wasn't very good as the air was dry and the temperature differential was high between night and day...

    But it is impressive what details a $30 camera and a 25 year old telescope can glean from Mars.

  6. Anybody play X-COM? by Fresnik · · Score: 0 · on Chemical Element 110 To Be Named

    Can't wait till they discover element 115.

  7. For anybody who's interested .. by cje · · Score: 1 · on Age of Universe Derived

    Here's some links to check out:

    sci.astro Cosmology FAQ
    Ned Wright's Cosmology Tutorial

    The above question is discussed, among other things.

  8. Sounds great, but... by Tom+Rothamel · · Score: 1 · on SETI@Home For Linux
    This is not just an encryption contest, and much more is at stake.

    Not really. The problem here is that it's difficult to detect earth-like signals from other planets. (In other star systems.) According to the Sci.astro FAQ, we couldn't detect a TV signal at a distance of 0.01 light years. (I'ts interesting that most of the signals that we transmit that _can_ be detected at that range we'd consider unimportant in a SETI search.)

    While this can probably detect an alien race transmitting a "beacon" meant for us to find, the chances of us finding earth-like leakage is minimal.