(NASA) Do extrasolar planets have water? In an attempt to find out, the orbiting Spitzer Space Telescope made detailed observations of the atmospheres of two planets that orbit stars other than our Sun. Unfortunately, water vapor was not detected in either exoplanet. Spitzer watched star systems HD 209458b and HD 189733b closely in infrared light both before and after the parent stars eclipsed their known planets. By comparing eclipsed and uneclipsed spectra very closely, astronomers could deduce bright light-emitting atmospheric gasses that were being blocked during eclipse. Were water vapor one of these atmospheric gases, a new indication that life might exist outside of our Solar System would have been found. The planets being analyzed are known as hot Jupiters — they have sizes close to Jupiter but orbits closer to the distance of Mercury. The above illustration shows an artist’s depiction of one of these dry worlds. Although no water vapor was detected this time, the techniques of measuring exoplanet atmospheres are quite promising, and the search for distant water and other biomarkers is just beginning.
A newly discovered 9,000-strong emperor penguin colony on Antarctica’s Princess Ragnhild coast. The colony has received its first human visitors, three team members from the polar research station Princess Elisabeth Antarctica. The colony of 1m-tall emperor penguins was first discovered in satellite imagery by scientists from the British Antarctic Survey and the US National Environment Research Council. However, the colony’s existence was unconfirmed until the visit from the Princess Elisabeth Antarctica team, who had been supporting the work of glaciologists carrying out scientific research on the Derwael ice rise | image by Alain Hubert
Rare Fire Rainbows: It looks like a rainbow on fire but these circumhorizontal arcs aren’t rainbows. They are caused by light passing through high-altitude cirrus clouds. The sun has to hit the clouds at precisely 58 degrees and have just enough crystals in order to form in the sky.