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Looking at her picture, you may think that Earth is a water world. But the fact is that she is 99-percent dry rock. According to our current solar system formation model, this is impossible—a mystery that has puzzled scientists until now. Rebecca Martin and Mario Livio—of the Space Telescope Science Institute in Baltimore, Maryland—may have found the solution to this riddle using data from the Hubble Space Telescope. By observing how young stars behave, they came up with a new model that may forever change our understanding on how planets are created.
Depending on their distance to the Sun, the planets had different characteristics. According to the standard model, any planets that fell within a certain zone would be dry and rocky. Any other planet outside that frontier would be ice water worlds
We said, wait a second, disks around young stars are not fully ionized. They're not standard disks because there just isn't enough heat and radiation to ionize the disk. Very hot objects such as white dwarfs and X-ray sources release enough energy to ionize their accretion disks, but young stars don't have enough radiation or enough infalling material to provide the necessary energetic punch to ionize the disks.
If the snow line was inside Earth's orbit when our planet formed, then it should have been an icy body. Planets such as Uranus and Neptune that formed beyond the snow line are composed of tens of percents of water. But Earth doesn't have much water, and that has always been a puzzle.
Although we may be more intelligent than an ant, we dont have the brain power to comprehend it all.
sci·ence /ˈsaɪəns/ Show Spelled[sahy-uhns] Show IPA
1. a branch of knowledge or study dealing with a body of facts or truths systematically arranged and showing the operation of general laws: the mathematical sciences.
2. systematic knowledge of the physical or material world gained through observation and experimentation.
3. any of the branches of natural or physical science.
4. systematized knowledge in general.
5. knowledge, as of facts or principles; knowledge gained by systematic study.
What is the importance of Ionization in the accretion disk?