Sky Safari Andromeda VT

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Sky Safari of the Constellation Andromeda

Transcript of Sky Safari Andromeda VT

Page 1: Sky Safari Andromeda VT

Sky Safari of the Constellation Andromeda

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Labelled All-sky View

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Caldwell 23 (NGC 891) – T1 hm

Spiral Galaxy

Distance 30 million LY

Diameter 120,000 LY

Discovered by Caroline Herschel in 1783

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Caldwell 23 (NGC 891) – T2 wf

Spiral Galaxy

Distance 30 million LY

Diameter 120,000 LY

Discovered by Caroline Herschel in 1783

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Golf Ball Cluster (NGC 752) – T1 wf

Open Star Cluster

Distance 1000 LY

Diameter 15 LY

Age 1 billion years

Discovered by Giovanni Hodierna in 1654, later rediscovered by Caroline Herschel in 1783

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Galaxy cluster Abell 262 – T1 hm

Distance 220 million LY

Diameter of cluster: 10 million LY (173 arc minutes)

The group of galaxies at the center of this image includes (top to bottom) NGC 703, 708, 705, and 704.

NGC 708, at the left of the group, is the brightest member.

NGC 704 has a companion, NGC 704B.

NGC 709 is slightly above/left of center

NGC 714 is at the left edge of image

NGC 700 is at bottom right.

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Galaxy cluster Abell 262 – T1 wf

Distance 220 million LY

Diameter of cluster: 10 million LY (173 arc minutes)

The galaxies are very faint in this wide-field image, but the cluster covers an area of 3 degrees (the middle half of the image).

Open cluster NGC 752 can be seen at top edge, left of center.

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Open star cluster NGC 956 – T1 hm

Distance unknown

Diameter of cluster: 8 arc minutes (size in LY unknown)

Discovered by John Herschel in 1831

The two bright stars at center are apparently foreground stars, a few hundred light years away.

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Open star cluster NGC 956 – T1 wf

Distance unknown

Diameter of cluster: 8 arc minutes (size in LY unknown)

Discovered by John Herschel in 1831

The cluster can be seen at the center of this wide-field image.

At bottom left is open cluster M34, in Perseus.

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Satellite Galaxy M110 – T1 hm

Elliptical galaxy – companion to Andromeda Galaxy M31

Distance 2.5 million LY

Diameter 10,000 LY

Discovered by Caroline Herschel in 1783

(Was included by Messier in his drawing of M31 in 1773, but he did not record it in his list as a separate galaxy.)

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Andromeda galaxy M31 – T1 hm

Spiral galaxy

Distance 2.5 million LY

Diameter 135,000 LY

Known since antiquity, was recorded by Persian astronomer Al-Sufi in 964

Charles Messier added M31 and its companion M32 to his list in 1773

This high-mag view shows the core of the galaxy and details of the dust lane

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Andromeda galaxy M31 – T2 wf

Spiral galaxy

Distance 2.5 million LY

Diameter 135,000 LY

Charles Messier added M31 and its companion M32 to his list in 1773

This wide-field image shows the spiral arms and dust lanes of M31.

M32 is the fuzzy bright spot at bottom center.

M110 is the faint fuzzy spot at top right.

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Sky Safari – A Slooh Production by Kochava Yerushalmit