"Does the astrobiology community still hold with the 5 kingdom classification system, or have other kingdoms been introduced and discussed?"
-
Question
What gases are found on the planet Mercury?
Mercury is so small (about the size of our Moon) that its feeble gravity can only hold on to a few wisps of gas and solar wind. Like our Moon, Mercury has almost no atmosphere. What little atmosphere exists is made up of solar wind particles (helium and hydrogen ions) and other atoms blasted off its surface by solar radiation (sodium, potassium, and oxygen). Because of Mercury's scorching surface temperatures, these atoms quickly escape into space to be soon replenished by the sun's rays.
January 28, 2002
- How frequently are questions answered?
- I asked a question but there was no answer?
- Who is the Astrobiologist answering these questions?
- Will I get an email when my question is answered?
- What college courses should I take to become an astrobiologist?
- How can I get a job as an astrobiologist at NASA?
- Have aliens visited Earth? Are UFOs real?
- Is there a planet or brown dwarf called Nibiru or Eris that is approaching the Earth and threatening our planet with widespread destruction?
- Is it true that the Sun will be in the center of the Milky Way Galaxy in December 2012 and that this will cause a pole shift and massive destruction.
- Has NASA discovered life on other worlds?
- Astrobiology Career Path Suggestions
