RFTS 2013 DSOs Images

• M1: Crab Nebula
• Neutron Star
• Taurus
• 6,500 ly

• M57: Ring [Planetary] Nebula

The ejected envelope of a red giant star, spread over a volume roughly the size of our solar system, with a hot central star that is in the process of becoming a white dwarf star

• M45 The Seven Sisters:
• Pleiades Star Cluster
• Taurus

Groups of stars

• globular clusters [GC]: 
• tight groups
• 100s of 1,000s of very old stars gravitationally bound

• open clusters: 
• more loosely clustered
• generally contain few 100 stars
• often very young

• M13 Hercules Globular Cluster: visible to the Naked Eye
• 25,100 ly

• COROT-2a Aquila: 
• Supernova
• has a planet in close orbit around it
• purple glow means it's an X-ray source
• a very active star

• Cas A Cassiopeia A:
• youngest known supernova remnant in the Milky Way galaxy

• Tycho's Star Cassiopeia:
• Supernova Remnant
• Type Ia
• Shines in Gamma Rays

• 1st:
• measure the total E coming from the explosion and how it declines with time
• 2nd:
• track the radiation produced when shock waves generated by the rapidly expanding supernova debris slam into surrounding gas If the light from the explosion dominates, the object is still a supernova 
• If the light from the collision dominates, it has become a supernova remnant

• Explosive death of a star
• caused by the sudden onset of nuclear burning in a white dwarf star

Small, cool faint stars at the lower-right end of the main sequence on the H-R diagram, whose color and size give them their name

• A dense stellar remnant produced by the collapse of the core of a massive star as part of a supernova that destroys the rest of the star
• Typically composed almost entirely of neutrons
• About 20km in diameter
• About 1.5 times as massive as the Sun

A system in which two stars orbit about their common center of gravity

Loosely bound collection of tens to hundreds of stars, a few parsecs across, generally found in the plane of the Milky Way.

Tightly bound, roughly spherical collection of hundreds of thousands, and sometimes millions, of stars spanning about 100 light years. Globular clusters are distributed in the halos around the Milky Way and other galaxies.

• Pleiades
• Hyades

M13 Hyades Hercules

nickname for M13 in Hercules

• M42 Orion:
• The Orion Nebula
• South of Orion's belt
• Closest region of massive star formation to Earth

• HLTau:
• youngest planet ever observed being born

SN1993J

Gliese 581

Wolf Rayet Star

Gamma Velorum

NGC 281 Pac Man

NGC7000 North American Nebula

30 Doradus The Tarantula Nebula

NGC 7293 The Helix Nebula

g359.23-0.82 The Mouse 

SS433 mini Quasar

Cygnus X-1

SGR A