Download CelestialObjects

Celestial Objects
• Solar System Objects
– Sun, Moon, Planets and Their Moons
• Galactic Objects
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Star Formation Regions
Open Clusters
Globular Clusters
Planetary Nebulae
Supernova Remnants
• Extra-galactic Objects
– Galaxies
Celestial Objects
• Solar System Information
http://www.seds.org/nineplanets/nineplanets/intro.html
• The brightest examples of Celestial Splendors
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