HISTORY 2720 Chapter Notes - Chapter 7: Body Force, Planetary System, Molecular Cloud

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Kuiper belt (40) - a ring of comets beyond neptune that is the remnant of an accretion disk where no planet was formed; home to pluto; in the. Nb: you are not required to memorize the names and dates of telescopes and extraplanetary missions. When was the telescope invented, and when were astronomers first able to find planets invisible to the naked eye? a. 17th century, found moons of jupiter and saturn, then in 18th and 19th, astronomers saw uranus and neptune. 1960s rocket tech was developed for military advantages in wwii. a. Uhuru x-ray satellite 1970, mapped x-ray sky, discovered remnants of hundreds of massive stars that exploded and the first direct evidence of black holes. Nasa hubble space telescope hst, launched 1990, fixed in 1993 by endeavour it captures very clear images of space. Which planets have been explored by landers and which by other spacecraft? a. b.

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