Christopher Palma

(he, him, his)
  • Teaching Professor of Astronomy & Astrophysics, Penn State
In 2015, NASA’s New Horizons spacecraft looked back toward the sun and captured this near-sunset view of the rugged, icy mountains and flat ice plains extending to Pluto’s horizon. NASA/JHUAPL/SwRI

Planetary confusion – why astronomers keep changing what it means to be a planet

Many people are still upset that Pluto was demoted from being a planet. But definitions of various celestial objects are fairly fluid. So whether it is an asteroid or moon or planet is up for debate.
The ISS sees us on Earth, but look up at night and you may see it, too. NASA

Look up – it’s a satellite!

A couple thousand satellites are orbiting Earth right now. Under the right conditions, your naked eye can spot these human-made objects in the night sky.

Contact Christopher for

  • Media request
  • Speaking request
  • Consulting / Advising
  • Research collaboration
  • Research supervision