![](https://webarchive.library.unt.edu/eot2008/20080917220251im_/http://astrobiology.nasa.gov/img/_placehold/placehold-ask.jpg)
![Ask an Astrobiologist](https://webarchive.library.unt.edu/eot2008/20080917220251im_/http://astrobiology.nasa.gov/img/text/ask-an-astrobiologist.gif)
"Has the grinders on spirit and opportunity turned up anything that vaguely look like small fossils?"
-
Question
Are there other known terrestrial planets seen other than those found in our solar system?
This is a subject I have discussed many times in "Ask an Astrobiologist". Briefly, we have not found any other terrestrial-size planets because we do not yet have the technology to search for such small planets. When the Kepler mission is launched next year, we expect to find out whether or not terrestrial planets are common (see http://kepler.nasa.gov/). Then it will be meaningful to speculate about how often such planets might be habitable. David Morrison
NAI Senior Scientist
October 30, 2007
![FAQ](https://webarchive.library.unt.edu/eot2008/20080917220251im_/http://astrobiology.nasa.gov/img/text/hd_faq.gif)
- 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