Universe

Andromeda

The constellation of Andromeda is a heroine in a grand Greek myth of the ancient Ethiopean dynasty. Almost all fields in autumn skies


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Constellation Chart

andromeda

The constellation of Andromeda is a heroine in a grand Greek myth of the ancient Ethiopean dynasty. Almost all fields in autumn skies are occupied by characters in this story, Andromeda, Cassiopeia, Perseus, Pegasus, Cepheus, and Cetus. The asterism consists of several bright stars with magnitudes of about 2, and there is a splendid galaxy of M31, The Andromeda Galaxy, at the side of Princess Andromeda. It could be said that the galaxy makes the name of this constellation popular.

Galaxies In Andromeda

M31

M31

I think you know at least the name of this Galaxy even if you don't gaze at stars habitually, it's a Messier's object representative of the night sky in autumn. M31 is only one celestial body recognized as a non-stellar object before the telescope was invented. M31 has a size of 190' x 60', it's larger than six times of that of the Moon. The Galaxy lies at about a fifteen-degree angle from being edge-on, and it has a bright oval nucleus, a dust lane become visible in medium-sized telescopes. Its distance is approximately 2.3 million light years.

M32

m32

The brighter and closer elliptical companion of the Andromeda galaxy, also known as NGC 221. This is the inner half of a V-band CCD image taken in twilight (15 seconds' exposure) at the prime focus of the 4-meter Mayall telescope of Kitt Peak National Observatory. North is at the top and east to the left, for direct comparison with a chart or eyepiece view. The center of M31 is to the north. This area subtends 7.3 arcminutes, and is shown with a logarithmic intensity mapping. Even so, the bright nucleus of M32 (probably the highest stellar density known in the entire Local Group) saturates the display.

M110

m110

This picture of the Andromeda Galaxy's companion Messier 110 is a color composite of CCD images from the 0.9-meter telescope of the Kitt Peak National Observatory, near Tucson, Arizona. The peculiar dark structures, very probably dust clouds, are clearly visible in this short exposure image; due to these structures, M110 is often classified as E5p or E6p. Because of its small (linear) size, this galaxy is usually counted as a dwarf spheroidal or dwarf elliptical rather than a normal elliptical galaxy.

NGC891

ngc891

NGC891 is a small galaxy in Andromeda, positioned at about 4 degrees east of gamma Andromedae. The galaxy is being edge-on with clearly distinguished dust-lane in large telescopes. NGC891 has a length of 13-arc minutes and visual magnitude of about 10, it's fairly hard to detect its spindle shape with normal vision. The galaxy can hardly be paid attention because the constellation has a representative object of The Andromeda galaxy (M31) in autumn skies.

NGC 7640

ngc7640

NGC 7640 is a barred spiral galaxy in Andromeda. A rough distance estimate for NGC 7640 is 19 Million Light Years, and at that distance its true diameter would be about 59,240 light years.

Open Cluster In Andromeda

NGC752

ngc752

NGC752 is a very scattered open cluster found around the left leg of Princess Andromeda. The cluster is positioned near the boundary on Triangulum, can be easily detected only with the nornal vision looks like a dimmed nebula. The cluster has an apparent diameter of 45 arc minutes, so telescopes aren't suitable for appreciating this object. You'll be fascinated with the cluster by using of binoculars that shows you plenty of fine stars appeared on the dimmed light. NGC752 has formed a vast triangle in the autumnal night skies with the Andromeda Galaxy (M31) and M33 in Triangulum. You shouldn't forget to appreciate NGC752 after enjoying these splendid galaxies.

Planetary Nebula In Andromeda

NGC7662

ngc7662

NGC7662 is a small planetary nebula in northern region of Andromeda. You can find out it about 3 degrees west of iota Andromedae, which forms the tip of her right arm. The nebula has a diameter of about 30 arc seconds and a visual brightness of about 9th magnitude. NGC7662 has a round shape, but this image shows you the nebula has non-even brightness. The beautiful bluish color is one of characteristics of NGC7662, and the nebula has an unique nickname of "The Blue Snowball". A good seeing condition will allow you to appreciate the impressive bluish shape through medium-sized telescopes. It's estimated that the nebula is about 1800 light years away.

Planetary Destinations In Andromeda

Upsilon Andromedae

upsilon Andromedae

Upsilon Andromedae Planetary System

Parent Star: Upsilon Andromedae (F8 V) in the constellation of Andromeda is located at a distance of 52 Light Years from our Solar system Co-ordinates of Right Ascension: 01 36 48.527 & 41 24 38.71. The apparent Magnitude of the star is 4.09. The Inner Edge of Habitability Zone is 0.95 AU & the Outer Edge of Habitability Zone: 2.98 AU and the estimated stellar lifespan of the star is 4156 million years. Orbiting around Upsilon Andromedae are planets Upsilon Andromedae b, Upsilon Andromedae c,Upsilon Andromedae d.

Upsilon Andromedae b the planet is believed to be a Cloudy Hot Jupiter planet and its existence has been confirmed. The planets appearance is Silicate clouds over dark sodium haze . The planet is positioned out side of Habitability Zone at Mean Orbital Distance of 0.059 AU and the estimated radius of the planet is 2.2 Jupiters. The planet Orbits around the star every 4.6171 ± 0.0003 Days and was discovered by Marcy and Butler in 1996.

Upsilon Andromedae c the planet is believed to be a Clarified Jovian, Eccentric planet and its existence has been confirmed. The planets appearance is Blue and cloudless. The planet is positioned out side of Habitability Zone at Mean Orbital Distance of 0.829 AU and the estimated radius of the planet is 1.024 Jupiters 1 . The planet Orbits around the star every 241.5 ± 1.1 Days and was discovered by Marcy and Butler in 1999.

Upsilon Andromedae d the planet is believed to be a Water Cloud Jovian, Eccentric planet and its existence has been confirmed. The planets appearance is White water ice clouds. The planet is positioned at the outer edge of habitable zone at Mean Orbital Distance of 2.53 AU and the estimated radius of the planet is 1.039 Jupiters 1. The planet Orbits around the star every 1284 ± 30 Days and was discovered Marcy and Butler in 1999.

Astronomers recently announced the detection of three large planets orbiting the star Upsilon Andromedae - the first planetary system known to orbit a normal star other than our Sun. These planets were not directly photographed but found through a Doppler technique developed to use large telescopes to search nearby stars for wobbling planetary signatures. However, Upsilon And itself is visible to the unaided eye shining in Earth's sky in the northern constellation Andromeda at about 4th magnitude.

HD 8673

HD 8673

Parent Star: HD 8673 (F7 V) in the constellation of Andromeda is located at a distance of 124.75 Light Years from our Solar system Co-ordinates of Right Ascension: 01 26 08.7849 & Declination: +34 34 46.921. The apparent Magnitude of the star is 6.34. The Inner Edge of Habitability Zone is 0.95 AU & the Outer Edge of Habitability Zone: 2.98 AU. Orbiting around HD 8673 is planet HD 8673 b the planet is believed to be a Brown Dwarf planet and its exitence has been confirmed. The Planets Appearance is unknown. The planet is positioned at the inner edge of Habitability Zone at Mean Orbital Distance of 1.58 AU. The planet Orbits around the star every 639 Days and was discovered by Hatzes and Gunther in 2005.

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