Sky Safari: William and Margaret Huggins
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Transcript of Sky Safari: William and Margaret Huggins
Sky Safari: Andromeda by Kochava Yerushalmit
Sky Safari: Andromeda by Kochava Yerushalmit
Sky Safari: Andromeda by Kochava Yerushalmit
Labeled All-sky ViewLabeled All-sky View
Sky Safari: Andromeda by Kochava Yerushalmit
Great Hercules Cluster (M13) – T1 hmGreat Hercules Cluster (M13) – T1 hm
Globular cluster in constellation Hercules
Distance: 25,000 LY
Size: about 120 LY
Age: about 12-14 billion years
Contains about 600,000 solar masses (probably around 100,000 very large stars)
Discovered by Edmond Halley in 1714, and later added to Messier’s list
Sky Safari: Andromeda by Kochava Yerushalmit
Sunflower Galaxy (M63) – T1 hmSunflower Galaxy (M63) – T1 hm
Spiral galaxy in constellation Canes Venatici
Distance: 30 million LY
Size: 100,000 LY
Contains about 140 billion solar masses
Included by Lord Rosse in his 1850 list of 14 “nebulae” with spiral structure
Discovered by Pierre Mechain in 1779 - the first object added by Mechain to Messier’s list
Sky Safari: Andromeda by Kochava Yerushalmit
Cat’s Eye Nebula (NGC 6543) – T2 hmCat’s Eye Nebula (NGC 6543) – T2 hm
Planetary nebula in constellation Draco
Distance: 3000 LY
Central star is a Wolf-Rayet star – a very hot star (temperature around 100,000 K) in last stages of life, ejecting mass at high speeds (several thousand km/sec)
Complex structure includes two expanding bubbles that are perpendicular to each other, surrounded by 9 spherical shells
Discovered by William Herschel in 1786
Sky Safari: Andromeda by Kochava Yerushalmit
Mechain’s Galaxy (M106) – T2 hmMechain’s Galaxy (M106) – T2 hm
Barred spiral galaxy in constellation Canes Venatici
Distance: 25 million LY
Size: 130,000 LY
“Active” galaxy with a central black hole of 40 million solar masses
Between the two visible arms are two additional arms of hot ionized gas, with no stars, visible in x-rays
Discovered by Pierre Mechain in 1781
Sky Safari: Andromeda by Kochava Yerushalmit
Spindle Galaxy (M102) – T2 hmSpindle Galaxy (M102) – T2 hm
Lenticular galaxy in constellation Draco
Distance: 50 million LY
Size: 90,000 LY
Lenticular galaxies have a disk and central bulge like a spiral, but no spiral arms; they contain mostly old stars, with little gas or dust
This galaxy was apparently discovered by Pierre Mechain in 1781; independently discovered by William Herschel in 1788
Sky Safari: Andromeda by Kochava Yerushalmit
Ghost of Jupiter (NGC 3242) – T2 hmGhost of Jupiter (NGC 3242) – T2 hm
Planetary nebula in constellation Hydra
Distance: around 2000 LY
Size: around 0.4 LY
Central star has a temperature around 60,000 K and a mass less than half of the sun
Discovered by William Herschel in 1785
Sky Safari: Andromeda by Kochava Yerushalmit
Sky Safari – A Slooh Production by Kochava Yerushalmit
Sky Safari – A Slooh Production by Kochava Yerushalmit