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How Far are the Stars? (part 2)
March 29, 2011 · Be The First To Comment

A few months ago, I shared with you how astronomers measure distances to the nearest stars using simple geometry. I also pointed out, however, that we can measure only our small neighborhood using the geometric method we call parallax. How then, can we possibly know the distances of stars even farther out? Well, we all […]

Everything you need to know about the Hubble Telescope
March 19, 2010 · 2 Comments

Next month marks the 20th anniversary of the Hubble Space Telescope’s launch into space.  On Apr. 24, 1990, at 8:33 a.m., the Space Shuttle Discovery (STS-31) took off, carrying Hubble as its primary payload.  Hubble is the result of a collaboration between NASA and the European Space Agency (ESA), the first of four space telescopes in NASA’s […]



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