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Comets
- Among the most brilliant and most rare objects in the night sky, a comet is a small, frozen mass of dust and gas revolving around the sun.. These soaring beacons with their beautiful tails come from the outer realms of the Solar System.
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![GreatComet1680_verschuier_681[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/10/GreatComet1680_verschuier_6811-150x150.jpg "The Great Comet of 1680 Over Rotterdam")
The Great Comet of 1680 Over Rotterdam
October 28th, 2013
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![cometmcnaught_druckmuller_1084[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/10/cometmcnaught_druckmuller_10841-150x150.jpg "Three Galaxies and a Comet")
Three Galaxies and a Comet
October 20th, 2013
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![20131015_IRM_LawrenceIMG4471-Crop-fullsize[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/10/20131015_IRM_LawrenceIMG4471-Crop-fullsize1-150x150.jpg "ISON, Mars, Regulus")
ISON, Mars, Regulus
October 17th, 2013
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![970401C_lodriguss_960[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/10/970401C_lodriguss_9601-150x150.jpg "Hale-Bopp: The Great Comet of 1997")
Hale-Bopp: The Great Comet of 1997
October 13th, 2013
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![ison_peach_1174[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/10/ison_peach_11741-150x150.jpg "Comet ISON Approaches")
Comet ISON Approaches
October 7th, 2013
- Explore all Comets
Galaxies
- A collection of stars, gas, and dust bound together by gravity. The smallest galaxies may contain only a few hundred thousand stars, while the largest galaxies have thousands of billions of stars. The Milky Way galaxy contains our solar system.
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NGC 7814: The Little Sombrero in Pegasus
October 25th, 2013
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![NGC5982_LRGB_leshin[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/10/NGC5982_LRGB_leshin1-150x150.jpg "Three Galaxies in Draco")
Three Galaxies in Draco
October 16th, 2013
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![n891_block950[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/10/n891_block9501-150x150.jpg "NGC 891 Edge-on")
NGC 891 Edge-on
October 11th, 2013
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Arp 94
October 9th, 2013
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![n1275hst_kelly[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/10/n1275hst_kelly1-150x150.jpg "Hubble Remix: Active Galaxy NGC 1275")
Hubble Remix: Active Galaxy NGC 1275
October 6th, 2013
- Milky Way
- Spiral Galaxies
- Clusters of Galaxies
- Colliding Galaxies
- Elliptical Galaxies
- Explore all Galaxies
Miscellaneous
- Our Universe is so vast that we can’t possibly categorize it all, explore the uncategorized!
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![hverirVetter1300[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/10/hverirVetter13001-150x150.jpg "Night on a Spooky Planet")
Night on a Spooky Planet
October 31st, 2013
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The Great Comet of 1680 Over Rotterdam
October 28th, 2013
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Little Planet Shadowrise
October 24th, 2013
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![Andromeda_on_the_rocksFattinnanzi[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/10/Andromeda_on_the_rocksFattinnanzi1-150x150.jpg "Andromeda on the Rocks")
Andromeda on the Rocks
September 27th, 2013
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A Landing on Planet Earth
September 14th, 2013
- Explore all Miscellaneous
Nebulae
- A nebula is a cloud of gas and dust in space. Some nebulas are regions where new stars are being formed, while others are the remains of dead or dying stars. Nebulas come in many different shapes and sizes. There are four main types of nebulas: Planetary nebulas, Reflection nebulas, Emission nebulas, and Absorption nebulas. The word nebula comes from the Latin word for cloud.
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![GS_20131023_Smoke_8422[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/11/GS_20131023_Smoke_84221-150x150.jpg "NGC 7841: The Smoke Nebula in Frustriaus")
NGC 7841: The Smoke Nebula in Frustriaus
November 1st, 2013
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![ic1340mrZonalunar[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/10/ic1340mrZonalunar1-150x150.jpg "A Spectre in the Eastern Veil")
A Spectre in the Eastern Veil
October 30th, 2013
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![orionwisps_colombari_3543[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/10/orionwisps_colombari_35431-150x150.jpg "Horsehead and Orion Nebulas")
Horsehead and Orion Nebulas
October 29th, 2013
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![CaveFinalWalker2048[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/10/CaveFinalWalker20481-150x150.jpg "Sh2-155: The Cave Nebula")
Sh2-155: The Cave Nebula
October 19th, 2013
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![carina_fenyes_3000[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/10/carina_fenyes_30001-150x150.jpg "The Great Carina Nebula")
The Great Carina Nebula
October 15th, 2013
- Emission Nebulae
- Planetary Nebulae
- Reflection Nebulae
- Supernova Remnants
- Explore all Nebulae
Sky
- The sky, also known as the celestial dome, commonly refers to everything that lies a certain distance above the surface of Earth, including the atmosphere and the rest of outer space. In the field of astronomy, the sky is also called the celestial sphere. This is an imaginary dome where the sun, stars, planets, and the moon are seen to be traveling.
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Night on a Spooky Planet
October 31st, 2013
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![NCPtreeLosada[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/10/NCPtreeLosada1-150x150.jpg "North Celestial Tree")
North Celestial Tree
October 23rd, 2013
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Three Galaxies and a Comet
October 20th, 2013
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![galcentre_venus_jschmoll[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/10/galcentre_venus_jschmoll1-150x150.jpg "Venus, Zodiacal Light, and the Galactic Center")
Venus, Zodiacal Light, and the Galactic Center
October 18th, 2013
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![noonalemma_tezel_1280[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/10/noonalemma_tezel_12801-150x150.jpg "High Noon Analemma Over Azerbaijan")
High Noon Analemma Over Azerbaijan
October 14th, 2013
- Views
- Messier Objects
- Explore all Sky
Solar Systems
- A solar system consists of a star and all the objects orbiting it as well as all the material in that system. Our Solar System includes the Sun together with the eight planets and their moons as well as all other celestial bodies that orbit the sun.
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![saturnmosaic_cassini_4000[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/10/saturnmosaic_cassini_40001-150x150.jpg "Saturn from Above")
Saturn from Above
October 21st, 2013
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![EquinoxEarthElektroL900[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/10/EquinoxEarthElektroL90011-150x150.jpg "Equinox Earth")
Equinox Earth
September 28th, 2013
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![solar-analemma-070000-900pix[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/10/solar-analemma-070000-900pix1-150x150.jpg "Apollo's Analemma")
Apollo’s Analemma
September 22nd, 2013
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![MoonVenusArg_2013_09_08_2169_16[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/10/MoonVenusArg_2013_09_08_2169_161-150x150.jpg "Crescent Moon Meets Evening Star")
Crescent Moon Meets Evening Star
September 13th, 2013
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![sunvenusuv3_dove_800[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/10/sunvenusuv3_dove_8001-150x150.jpg "Venus and the Triply Ultraviolet Sun")
Venus and the Triply Ultraviolet Sun
August 20th, 2013
- Mars
- Saturn
- Mercury
- Venus
- Earth
- Earth's Moon
- Jupiter
- Jupiter's Moons
- Saturn's Moons
- Neptune
- Pluto
- Explore all Solar Systems
Space Technology
- From rockets to observatory’s, explore the technology that powers space exploration.
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Antares Rocket Launch
September 21st, 2013
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![skylab_nasa_3000[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/10/skylab_nasa_30001-150x150.jpg "Skylab Over Earth")
Skylab Over Earth
August 18th, 2013
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![o-WASHCLOTH-SPACE-facebook[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/04/o-WASHCLOTH-SPACE-facebook1-150x150.jpg "Wringing a Wet Towel in Orbit")
Wringing a Wet Towel in Orbit
April 24th, 2013
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Yuri’s Planet
April 12th, 2013
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Space Station Lookout
April 10th, 2013
- Space Stations
- Earth Observatories
- Explore all Space Technology
Stars
- A star is a huge sphere of very hot, glowing gas. Stars produce their own light and energy by a process called nuclear fusion. Fusion happens when lighter elements are forced to become heavier elements. When this happens, a tremendous amount of energy is created causing the star to heat up and shine. Stars come in a variety of sizes and colors. Our Sun is an average sized yellowish star. Stars which are smaller than our Sun are reddish and larger stars are blue.
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![sungrazer_soho_1024[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/10/sungrazer_soho_10241-150x150.gif "Sungrazer")
Sungrazer
October 27th, 2013
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![NGC7789CarolinesRose_barr[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/10/NGC7789CarolinesRose_barr1-150x150.jpg "NGC 7789: Caroline's Rose")
NGC 7789: Caroline’s Rose
October 26th, 2013
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![ngc6357_hubble_3140[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/10/ngc6357_hubble_31401-150x150.jpg "A Massive Star in NGC 6357")
A Massive Star in NGC 6357
October 22nd, 2013
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![sunspectrum_noao_3071[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/10/sunspectrum_noao_30711-150x150.jpg "All the Colors of the Sun")
All the Colors of the Sun
October 2nd, 2013
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Apollo’s Analemma
September 22nd, 2013
- Supernovas
- Binary Stars
- Globular Clusters
- Black Holes
- Neutron Stars
- Nurseries
- Open Clusters
- Sun
- Explore all Stars
Uncategorized
- These are just APOD’s I have yet to assign a category to, this will not be included in the final design.
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A Flight through the Hubble Ultra Deep Field
August 27th, 2013
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A Year of Sky on Earth
July 24th, 2013
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![ngc6752_2013_07_02dp[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/10/ngc6752_2013_07_02dp11-150x150.jpg "Globular Star Cluster NGC 6752")
Globular Star Cluster NGC 6752
July 5th, 2013
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Circling a Black Hole at its Photon Sphere
July 2nd, 2013
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![hyperion_cassini_1024[1]](https://apod.rhettforbes.com/wp-content/uploads/2013/07/hyperion_cassini_10241-150x150.jpg "Saturn's Hyperion: A Moon with Odd Craters")
Saturn’s Hyperion: A Moon with Odd Craters
June 30th, 2013
- Explore all Uncategorized
Videos
- Explore APOD’s as moving pictures!
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Mysterious Green Patches on the Sky
September 30th, 2013
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Rotating Moon from LRO
September 16th, 2013
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A Flight through the Hubble Ultra Deep Field
August 27th, 2013
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Noctilucent Clouds and Aurora Over Scotland
August 19th, 2013
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130 Years of Earth Surface Temperatures
July 31st, 2013
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