Media Experts

Asteroid impacts, comets, moon, space missions

H. Jay Melosh H. Jay Melosh Download image

H. Jay Melosh, Distinguished Professor of Earth, Atmospheric and Planetary Sciences and Physics, can discuss a variety of topics including asteroids, comets, the moon and planets. Melosh has served as a member of the science team for three NASA space missions to study comets and one lunar gravity mission.

He is an expert in impact cratering and a co-creator of "Impact: Earth!" a tool to estimate the potential damage a comet or asteroid would cause if it hit the Earth. He also is co-author of the 2010 National Research Council report “Defending Planet Earth” that explored the feasibility of detecting all Earth-crossing asteroids greater than 140 meters in diameter and ways to mitigate their hazard.

He also can discuss:

  • The exchange of microorganisms between the terrestrial planets and the possibility of life on other planets.
  • The possibility of lava tubes on the moon that could provide shelter for human colonies.
  • The asteroid impact theory of dinosaur extinction.
  • The theory of the giant impact origin of the moon.

Contact: H. Jay Melosh,

Purdue University, 610 Purdue Mall, West Lafayette, IN 47907, (765) 494-4600

© 2015-19 Purdue University | An equal access/equal opportunity university | Copyright Complaints | Maintained by Office of Strategic Communications

Trouble with this page? Disability-related accessibility issue? Please contact News Service at