Planetary news, 02-2／行星資訊 02-2

CKYan

Credit: NASA
The "Astronomical Unit" May Need an Upgrade as the Sun Loses Mass.
太陽不斷流失質量會導致天文單位的修訂．
http://space.newscientist.com/article/dn13286-astronomical-unit-may-need-to-be-redefined.htm

Credit: JPL
Another Asteroid Passes Close to Earth.
又一新發現近地小行星飛越地月空間．
http://www.slooh.com/blog/suv-sized-asteroid-makes-surprise-pass-between-the-earth-moon/

Credit: NASA/JPL/Space Science Institute
Saturn's Giant Sponge.
土星大掃除．
http://www.nasa.gov/centers/goddard/news/topstory/2008/saturn_sponge.html

Credit: ESA
ESA presents Mars in 3D.
三維火星圖．
http://www.esa.int/esaSC/SEM8Q2PR4CF_index_0.html

Image Credit: Sciencepoles.org
Climate change 'tipping point' within 100 years.
一百年內地球氣候變化達致無可復原的危險邊緣．
http://www.telegraph.co.uk/earth/main.jhtml?xml=/earth/2008/02/05/eatip105.xml

Credit: ESA
Venus Express Detects Water Vapour in Low Altitude Clouds.
金星低層雲存在水分．
http://www.esa.int/esaSC/SEMMJ432VBF_index_0.html

Credit: NASA
Cassini at Saturn Interactive Explorer.
親身感受飛往土星的旅程．
http://saturn.jpl.nasa.gov/multimedia/CASSIE/


香港天文學會
月球行星組