Starship Asterisk*

For Professional Astronomer if possib Re: Star forming regions What, if known, causes these star forming regions? What causes the "star stuff" to collect in an area and for the material to start pulling together to form stars? Is it simply all gravity? Do these areas come and go? If so, I ...

A question for the professionals. The picture of the day today showing all the hydrogen around the horsehead nebula lead me to wonder. Do the professional astronomers feel that perhaps their studies may in some way lead to our being able to obtain energy from nuclear fusion, or perhaps a fission, fu...