We always advise students about the values of a good internship in their education. Students will not only gain invaluable experience, build crucial network and polish their resume. They may also be hired by the same company after they graduate.
There are great summer internship opportunities in our high technology neighbor: NASA Johnshop Space Center. You can look at the intern program for planetary science (http://www.lpi.usra.edu/lpiintern/) through the Lunar and and Planetary Institute (LPI: http://www.lpi.usra.edu/nlsi/). One of our students, a UHCL NSF Scholar, participated in the last summer intern program, co-published a nice paper in a highly regarded conference, and is now applying for graduate school. He can attest to the excellent value of the LPI internship in advancing his career goal.
So check it out. It may work well for you too! Good luck.