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23 August 2010
Tight Binaries are ‘Death Stars’ for Planets
Astronomers studying double star systems where the two stars are extremely close have found a pattern of destruction. While there probably isn’t a Star Wars-like Death Star roaming the Universe, tight binary systems might provide the equivalent of Darth Vader’s favorite weapon. "This is real-life science fiction," said Jeremy Drake of the Harvard-Smithsonian Center for [...]
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20 February 2010
ESA's Tough Choice: Dark Matter, Sun Close Flyby, Exoplanets (Pick Two)
Key questions relevant to fundamental physics and cosmology, namely the nature of the mysterious dark energy and dark matter (Euclid); the frequency of exoplanets around other stars, including Earth-analogs (PLATO); take the closest look at our Sun yet possible, approaching to just 62 solar radii (Solar Orbiter) … but only two! What would be your [...]
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08 February 2010
If the Earth is Rare, We May Not Hear from ET
If civilization-forming intelligent life is rare in our Milky Way galaxy, chances are we won't hear from ET before the Sun goes red giant, in about five billion years' time; however, if we do hear from ET before then, we'll have lots of nice chats before the Earth is sterilized. That's the conclusion from a recent [...]
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20 October 2009
Organic Molecules Detected in Exoplanet Atmosphere
The basic chemistry for life has been detected the atmosphere of a second hot gas planet, HD 209458b. Data from the Hubble and Spitzer Space Telescopes provided spectral observations that revealed molecules of carbon dioxide, methane and water vapor in the planet's atmosphere. The Jupiter-sized planet – which occupies a tight, 3.5-day orbit [...]
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20 December 2007
ET Would Know There's Life on Earth
It seems impossible to believe, but astronomers are now making plans to reach for the brass ring of planet hunting: to find Earth-sized worlds orbiting other stars, and then to analyze them to see if there's life. But you've got to know what you're looking for. That's why astronomers are considering what the Earth might [...]
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05 December 2007
Could We Detect Plants on other Planets?
We've already found over 250 extrasolar planets, and more are continuing to be discovered fairly often. With all of these new planets popping up, the obvious question must be asked: how do we go about detecting whether or not they contain life? Though we can't yet see features on the surface with even the most [...]
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12 July 2007
If There's Oxygen, There's Life
If aliens visited our Solar System, it would only take them a moment to figure out which planet is the one with all the life on it. That's because our atmosphere has a high percentage of oxygen in its atmosphere. The presence of oxygen in our atmosphere has given scientists the key to searching for [...]
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