Celestial Objects Solar System Objects Galactic Objects Sun, Moon, Planets and Their Moons Galactic Objects Star Formation Regions Open Clusters Globular Clusters Planetary Nebulae Supernova Remnants Extra-galactic Objects Galaxies

Celestial Objects http://www.seds.org/messier/Messier.html Solar System Information The brightest examples of Celestial Splendors http://www.seds.org/nineplanets/nineplanets/intro.html http://www.seds.org/messier/Messier.html

Earth’s Moon Complete set of phases over 29.5 days (27.3 day orbital period)

Planets Planos = Wanderer among the fixed stars Bright disk (non stellar) in small telescopes

Milky Way Galaxy The Milky Way center in the direction of Sagittarius A comet, nature’s own cosmic dirty snowball.

Open Cluster Thousands of stars, sometimes gravitationally bound Contain the youngest, hottest galactic stars Associated with star formation regions in the galaxy.

Globular Cluster Hundreds of thousands of stars, gravitationally bound and spherically symmetric. Contain the oldest galactic stars Symmetrically distributed about the galaxy.

Star Formation Regions Giant clouds of gas and dust (mostly Hydrogen and Helium)

Planetary Nebula Hydrogen rich atmosphere from a dying solar-type star Central core of nebula (white-dwarf)

Supernova Remnant Stellar Explosion Leftovers Star Guts

Spiral Galaxies Millions upon millions of stars Star forming regions abound Globular clusters identified

Elliptical Galaxies Millions upon millions of stars Resemble Globular Clusters only on a Galactic scale. No spiral structure, very little star formation