Saturday, 10 September 2016
In March, 2009, NASA started a mission called the Kelper mission, devoted to finding potential planets with liquid water. The Kelper mission have found 4,706 planets (2,326 of these planets found in the first 16 months of the mission). NASA has stated that Kepler-22b (the planet) may have liquid water on it like Earth, making it our closest possible sister planet. As NASA writes, “the planet is 2.4 times the size of Earth, making it the smallest yet found to orbit in the middle of the habitable zone of a star like our sun.” This is just one of thousand's of planets that the Kelper mission have found, some more promising than others, but they all can be our next EARTH.
Thursday, 8 September 2016
The gas planets are Jupiter, Saturn, Uranus and Neptune. These planets contain mostly gases, such as hydrogen and helium, and have a relatively small amount of rocky land. These planets have an complex atmospheres and in many cases, giant storms. these planets probably started out as icy rocks, and are able to collect hydrogen and helium. Jupiter and Saturn probably had bigger starting rocks, making it easier to collect these gases. Uranus and Neptune have bigger orbits and are smaller, it was harder for them to collect hydrogen and helium as efficiently as Jupiter and Saturn. This likely explains why they are smaller than those two planets. Their atmospheres are more “polluted” with heavier elements such as methane and ammonia because they are so much smaller.