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  • Behind the Spacecraft: Michelle Chen

    Behind the Spacecraft: Michelle Chen

    NASA’s #DARTmission will purposely crash a spacecraft into an asteroid to change its orbital period. But in order to hit the mark, this test mission needs to locate its target first. That’s why Johns Hopkins APL engineer Michelle Chen helped develop new autonomous navigation techniques that will ensure a bullseye. Follow DART: www.nasa.gov/DART

    The DART mission is a test of a technique that could be used to mitigate the threat of an asteroid on a collision course with Earth should one be discovered in the future. DART’s target is not a threat to Earth. While no known asteroid larger than 140 meters in size has a significant chance to hit Earth for the next 100 years, only about 40 percent of those asteroids have been found as of October 2021.

  • Behind the Spacecraft: NASA’s DART, the Double Asteroid Redirection Test

    Behind the Spacecraft: NASA’s DART, the Double Asteroid Redirection Test

    NASA is crashing a spacecraft into an asteroid… on purpose! Our #DARTmission is a first-of-its-kind #PlanetaryDefense test to change the motion of an asteroid in space so that we could use this technique if an asteroid were ever discovered to be a threat to Earth. Follow DART: www.nasa.gov/DART

    The DART mission is a test of a technique that could be used to mitigate the threat of an asteroid on a collision course with Earth should one be discovered in the future. DART’s target is not a threat to Earth. While no known asteroid larger than 140 meters in size has a significant chance to hit Earth for the next 100 years, only about 40 percent of those asteroids have been found as of October 2021.

    Producer/Editor: Jessica Wilde
    Producer: Scott Bednar
    Videographers: James Lucas and Seth Robinson

  • Behind the Spacecraft: Andy Rivkin

    Behind the Spacecraft: Andy Rivkin

    NASA’s #DARTmission is crashing a spacecraft into an asteroid to try to change its motion in space. But how will we know if this test worked? That’s where Johns Hopkins APL scientist Andy Rivkin comes in. He’ll be studying the precise change in the asteroid’s motion right here from Earth. In fact, Andy loves DART so much, he even wrote a song about it. Follow DART: www.nasa.gov/DART

    The DART mission is a test of a technique that could be used to mitigate the threat of an asteroid on a collision course with Earth should one be discovered in the future. DART’s target is not a threat to Earth. While no known asteroid larger than 140 meters in size has a significant chance to hit Earth for the next 100 years, only about 40 percent of those asteroids have been found as of October 2021.

  • Real People Behind NASA’s Hidden Figures

    Real People Behind NASA’s Hidden Figures

    NASA kicked off a yearlong centennial celebration for its Langley Research Center in Hampton, Virginia, with events Dec. 1 highlighting the critical work done by the African American women of Langley’s West Computing Unit, a story told in the book and upcoming movie “Hidden Figures”. During a NASA education event that was streamed to schools across the country, NASA Administrator Charles Bolden, Film director Ted Melfi, NASA Chief Historian Bill Barry, who consulted on the film, and NASA Modern Figure Julie Williams-Byrd, an electro-optics engineer for the Space Mission Analysis Branch at Langley, discussed the work of past and present NASA figures benefits humanity and enable future long-duration human and robotic exploration into deep space, including the agency’s Journey to Mars.

  • What’s the Physics Behind Texting?

    What’s the Physics Behind Texting?

    What’s the science behind texting? When you hit send, how does your message leave your phone and make the journey to your friend’s phone?
    Subscribe: http://youtube.com/whatthephysics?sub_confirmation=1
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    CREDITS:

    Host, Writer, Animator, Editor:
    Greg Kestin

    Special thanks:
    Tyler Howe
    Julie Elsky
    Lissy Herman
    Patrick Mitran
    Jerry Gibson
    Lauren Aguirre
    Kristine Allington
    Anna Rothschild
    Allison Eck
    Ari Daniel
    Lauren Miller

    From the producers of PBS NOVA
    © WGBH Educational Foundation

    Funding provided by FQXi

    SCIENTIFIC NOTES:
    – Messages can also be encoded by altering the phase of the signal being sent from the antenna.
    – Phones use several (~8) frequencies at one time, and since there are limited frequencies (~100) for the tower to use, manages the sharing of them.

    MEDIA CREDITS:

    Music provided by APM:
    Curio C

    Sound effects:
    Freesound.org

    Images:
    Two tree cell towers (Devra)
    Top of cell tower (Ervins Strauhmanis)

    Stock footage from Pond5:
    digital-computer-brain-binary
    bangkok-city-skyline-aerial-da
    aerial-fly-over-green-forest-c