asteroid

Asteroid

Eight is Enough?
August 16, 2008 · 6 Comments

photo credit: CommandZed Two years ago this month, the International Astronomical Union adopted a new definition of ‘planet’ which excludes Pluto. Not only do I, as Planetarium Astronomer, continue to get questions about Pluto’s ‘demotion’, but scientists themselves continue to debate it. Right now (August 14-16, 2008), a conference called “The Great Planet Debate:Science as […]

Meteorites and Meteor-wrongs
May 22, 2008 · 32 Comments

My role as Planetarium Astronomer includes answering astronomy questions from the public over the phone, by email, and in person.  Thus, it is up to me to examine meteorite samples brought in by the public.  Or, I should say, “meteor-wrongs,” as none of the samples brought in since 1996 (when I began doing this) have […]

Sky Walking: Astronaut Style
April 25, 2008 · 2 Comments

Thomas D. Jones, PhD is a veteran NASA astronaut, scientist, speaker, author, and consultant. He holds a doctorate in planetary sciences, and in more than eleven years with NASA, flew on four space shuttle missions to Earth orbit. In 2001, Dr. Jones led three spacewalks to install the centerpiece of the International Space Station, the […]

Science Doesn’t Sleep (4.17.08)
April 17, 2008 · 1 Comment

  photo credit: antjeverena So here’s what went down since you logged off. You can stop building your asteroid impact shelter – that German kid got it wrong. NASA stands by their estimate of the asteroid Apophis’ chance of colliding with Earth, also denying they ever admitted an error. 1 in 450, 1 in 45,000 – […]



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