March 3, 2018
The Flame and Horsehead Nebulas, NGC 2024 and IC 434, respectively. These are examples of emission and dark nebulas. Emission nebulas are excited by radiation from hot, young stars hidden behind the glowing gas. Dark nebulas are dust clouds that obscure and block light from objects behind them. These nebula lie about 1500 light years away in the constellation Orion, the Hunter, visible high overhead this time of year. These nebula are South, and slightly East of the Easternmost star in Orion’s belt. (Photo Courtesy HDAC members)
Stories this photo appears in:
The year is 1956. The National Science Foundation is in search of another peak to place a National Astronomical Observatory. An aerial reconnaissance produced 150 possible sites, which was later narrowed down to five, and then two.