Definitions

1. This spiral structure is beginning to re-emerge, as seen in the faint arms or spokes between the outer ring and bulls-eye shaped nucleus.

Large Spirals

1. Large spirals can merge with small galaxies and retain a spiral structure. (Web site)

Superb Spiral Structure

1. Modern photos show the superb spiral structure of the M81. At some 36,000 light years in diameter, it is one of the densest known galaxies. (Web site)

Regions

1. From a dark site, Messier 101 rewards determined observation with spiral structure and embedded H II regions.

Thought

1. It was once thought that the spiral structure of galaxies might be controlled by a strong magnetic field.

Common

1. As is common in galactic encounters, spiral structure is preferably induced in the more massive galaxy. (Web site)

Trace

1. Dark dust lanes are mixed in with the stars and trace the spiral structure of the galaxy. (Web site)

Brilliant

1. The galaxy's hallmark is a brilliant white, bulbous core encircled by thick dust lanes comprising the spiral structure of the galaxy.

Telescope

1. I actually thought you could only see the spiral structure with a telescope of at least 12" aperture.
2. Through an 8" or 10" telescope with excellent sky conditions, the spiral structure is very obvious.

Shows

1. NGC 7331, a Type 2 Seyfert galaxy about 43 million light-years away, shows a superb spiral structure.

Scientific Data

1. This page also explains what scientific data there is for the spiral structure of our galaxy. (Web site)

Elliptical Galaxy

1. M89 is an elliptical galaxy with no spiral structure.

Elliptical Galaxies

1. Elliptical Galaxies Many galaxies take the form of ellipsoids, with no spiral structure or flattened disks. (Web site)

Irregular Galaxy

1. Irregular Galaxy A galaxy with no spiral structure and no symmetric shape. (Web site)

Lenticular Galaxy

1. Maffei 1 is a lenticular galaxy, which has a disk-like structure and a central bulge but no spiral structure or appreciable dust content. (Web site)

Own Milky Way Galaxy

1. Seen from 'above', the spiral structure of our own Milky Way galaxy is a little clearer.

Light-Years

1. In fact, on close inspection the nucleus of this classic barred spiral itself shows a remarkable region of spiral structure about 3,000 light-years across.
2. Explanation: Perhaps the original spiral nebula, M51 is a large galaxy, over 60,000 light-years across, with a readily apparent spiral structure. (Web site)

Milky Way Galaxy

1. The spiral structure resembles that of the Milky Way Galaxy in which we live, but Messier 83 also possesses a bar-like structure at the centre. (Web site)

Hubble Space Telescope

1. Thanks to the high resolution of the Hubble Space Telescope, we can now discern, even at this great distance, spiral structure in some of the galaxies. (Web site)

Pinwheel Galaxy

1. This perspective shows off the spiral structure that gives it the nickname the Pinwheel Galaxy. (Web site)

Spiral Galaxy

1. NGC 3115 is also known as the "Spindle Galaxy." It is a lenticular, a "spiral galaxy without spiral structure", i.e. (Web site)

Spiral Galaxies

1. Lenticular (S0) These are, in short, "spiral galaxies without spiral structure", i.e. (Web site)

Oblique Angle

1. This beautiful galaxy is tilted at an oblique angle on to our line of sight, giving a "birds-eye view" of the spiral structure. (Web site)

Larger Galaxy

1. Induced spiral structure in the larger galaxy isn't the only effect of the interaction. (Web site)

Loosely

1. Many spiral galaxies possess numerous, loosely shaped arms which make their spiral structure less pronounced. (Web site)

Planetary Nebulae

1. Thus there are continuous studies of the spiral structure, globular and open clusters, interstellar matter, planetary nebulae, supernova remnants (see e.g. (Web site)

Nebula

1. In 1887, Isaac Roberts obtained the first photographs of the Andromeda "Nebula," which showed the basic features of its spiral structure for the first time. (Web site)
2. Lord Rosse erroneously suspected to have detected some spiral structure in this nebula. (Web site)
3. In 1887 the first photograph revealed the spiral structure of the Andromeda Galaxy, which was then known as a nebula. (Web site)

Spiral Arms

1. Origin of the spiral structure The early pioneer of studies on the formation of the spiral arms was Bertil Lindblad.

Milky Way

1. Like early explorers mapping the continents of our globe, astronomers are busy charting the spiral structure of our galaxy, the Milky Way. (Web site)
2. After 1952 the first maps of the neutral hydrogen in the Galaxy were made and revealed, for the first time, the spiral structure of the Milky Way.
3. Like the Milky Way, the spiral structure of Andromeda is surrounded by a sphere or halo of stars and unseen "dark matter," Ibata said.

Small Telescope

1. With binoculars or even a small telescope you can see more detail, and may even begin to see some of the spiral structure. (Web site)

Dark Skies

1. To observe the spiral structure in modern instruments requires a fairly large instrument, very dark skies, and a low power eye piece. (Web site)

Abalone

1. The spiral structure, so common in snail shells, is flattened in the abalone and may be obscured by fouling and shell boring organisms.

Abalones

1. The shells of abalones have a low and open spiral structure, and are characterized by several respiratory holes in a row near the shell's outer edge. (Web site)
2. The shells of abalones have a low and open spiral structure, and are characterized by several open respiratory pores in a row near the shell's outer edge.

M51

1. M51 is the first galaxy in which spiral structure was discovered, by Lord Rosse in 1845. (Web site)
2. Object data: M51, the 'Whirlpool Galaxy' in Canes Venatici is famous for its beautiful spiral structure, first noted by Lord Rosse in 1845.
3. In 1845 William Parsons noticed that M51 (believed to be a nebula) had a spiral structure.

Galaxies

1. The interaction of both galaxies induces a bunch of collateral effects, being the spiral structure of the main galaxy only one of them.
2. Explanation: Not all galaxies have spiral structure like our Milky Way. (Web site)
3. The sharpened map of the galaxy also raises new questions, such as how gravity affects the spiral structure in galaxies. (Web site)

Galaxy

1. Astronomers did not know that the Galaxy had a spiral structure until 1953, when the distances to stellar associations were first obtained reliably.
2. In the mid-1800s, Lord Rosse identified spiral structure within the galaxy, making this one of the first galaxies in which such structure was identified. (Web site)
3. If the inner parts of the arms rotate faster than the outer part, then the galaxy will wind up so much that the spiral structure will be thinned out. (Web site)

Spiral Structure

1. This was the first galaxy recognised as having a spiral structure, this structure being first observed by Lord Rosse in 1845. (Web site)
2. This galaxy was the first one where the spiral structure was discovered, in spring 1845 by Lord Rosse, who made a very careful and acurate painting. (Web site)
3. Astronomers speculate that M51 's spiral structure is primarily due to its gravitational interaction with a smaller galaxy just off the top of this image.

Categories

1. Science > Astronomy > Universe > Galaxy
2. M51
3. Gravitational Interaction
4. Abalones
5. Dark Skies
6. Books about "Spiral Structure" in Amazon.com
   

Continue: More Keywords - - - - - - - - - -