John Crassidis

PhD

John Crassidis.

John Crassidis

PhD

John Crassidis

PhD

Research Interests

Spacecraft attitude determination & control; formation flying guidance & navigation; robust nonlinear control; vehicle attitude dynamics

Biography Publications Teaching Research Latest News

Latest News

  • Why the world needs a mechanism to regulate space debris
    9/7/26

    TRT World featured John Crassidis in an article about the growing threat of space debris as satellite mega-constellations expand. 

  • Orbital gridlock: the SpaceX moon crash is a sign of things to come
    8/5/26

    The Observer featured the expertise of John Crassidis in a report on how a four-ton section of a SpaceX rocket hit the moon, creating a crater as wide as three tennis courts. 

  • SpaceX Leads Race To Dodge Orbital Debris As Risk Outpaces Regulation
    7/23/26

    Investor’s Business Daily featured the expertise of John Crassidis in a report on the growing number of satellites in low-Earth orbit. 

  • Mystery spheres on beach are likely space debris that fell back to Earth
    7/10/26

    CNN featured the expertise of John Crassidis in an article about six mysterious metal spheres — suspected space debris — that washed ashore recently in northern Queensland, Australia. 

  • NASA Stops the Sky from Falling
    7/6/26

    The Washington Post quoted John Crassidis in an article about how the Neil Gehrels Swift Observatory is falling out of orbit. 

  • A SpaceX rocket booster is on track to hit the moon at several times the speed of sound
    5/1/26

    Scientific American sought the expertise of John Crassidis regarding a Space X booster rocket that is on track to strike the moon at several times the speed of sound. 

  • The Looming Risk of Too Many Satellites and Debris in Space
    4/16/26

    Time magazine sought the expertise of John Crassidis regarding the looming threat of space debris, and the precautions taken by astronauts on the International Space Station to avoid impacts.