Asteroid Close Approaches Written for Astronomy 360

Web Links for asteroid research and Halley’s Comet et#Orbit_and_origin

NASA

NASA’s Wide Field Infrared Survey Explorer is now active

M31

A nebula containing young, massive stars is located 20,000 light-years away in the Carina spiral arm of our Milky Way Galaxy. It contains a central cluster of huge, hot stars, called NGC3603 The cluster contains some of the most massive stars known.

Halley is generally pronounced /ˈhæli/, rhyming with valley, or /ˈheɪli/ rhyming with daily, [15] but Edmond Halley himself probably pronounced his name /ˈhɔːli/ "Hawley", as in the word "hall". [16]/ˈhæli/ [15] [16]