Infrared imaging by JPL’s Cassini spacecraft has shown the existence of large methane lakes near the equator of Saturn’s moon Titan 다운로드. One of them is about the size of Utah’s Great Salt Lake at its lowest recorded level and is at least three feet deep. The spacecraft also discovered smaller, shallower “ponds” nearby similar to marshes on Earth, with knee- to ankle-level depths 인터스텔라 영화 다운로드.
Astronomers have previously observed large methane lakes near Titan’s poles, but the discovery of the “tropical” lakes is a surprise because it was generally assumed that this region was too warm to allow such lakes to exist for any length of time 잠시만 안녕 다운로드. Titan’s weather system is similar to Earth’s in one respect, but with liquid methane instead of water. The methane near the equator evaporates and is transported by winds to the poles, where it condenses back into a liquid 젬크래프트 다운로드.
…Like water vapor, which dissociates in the upper atmosphere to form ozone, methane is also dissociated by sunlight to produce reactive carbon atoms that can combine to form organic chemicals such as amino acids 다운로드. Such compounds have been detected in Titan’s atmosphere and are the basis of some researchers’ speculation that Titan may harbor life forms of some sort 연희 몽상 다운로드.
Mesmerizing timelapse of the Earth is the highest resolution single-shot imagery ever taken of our planet from space 돈스타브 다운로드.
The video and images were snapped by the Russian weather satellite Elektro-L during its orbit 36,000 kilometers above the equator. The images are in 121 megapixels; That’s 1 km per pixel 다운로드. In the video shown above here, the images are in true color, but if you really want to see the vegetation pop out, watch it in the infrared– the vegetation will instead appear orange (video below) 다운로드.
Also unlike most NASA photos of the Earth from space, these images were snapped in a single shot. By contrast, NASA’s photos are usually composites of several photographs 다운로드.
Not since The Blue Marble— the famous photograph snapped by Apollo 17 astronauts on their way to the Moon in 1972– has there been such a spectacular and moving single-shot view of the Earth 파괴의군주 다운로드.
via – Mother Nature Network