Question

What are the differences between Astrobiology, Exobiology, and Xenobiology?

Answer 1

Each deals with different subsets of the study of life. See below for definitions.

Explanation:

Biology is the study of living organisms. The three specific types of biology listed in the question are:

Astrobiology is concerned with the study of life on Earth and in Space.

https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=astrobiology+definition

Exobiology is concerned with the study of the likelihood of the existence of life on other planets and what form(s) it might take.

https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=exobiology+definition

Xenobiology is concerned with forms of life that aren't known to science and nature as yet. It's a subset of synthetic biology and deals with the creating, synthesizing, and manipulating of life systems.

https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=xenobiology+definition