Information request about Galaxies

In summary, the conversation is about the positioning of galaxies and the availability of lists with calculated Cartesian coordinates rather than translating them from polar coordinate vectors. The Tully database, which contains 2367 galaxies, is recommended as the best resource for this information. Other databases, such as GOLDmine, may also be useful. However, the 28,000 galaxy Tully database is not yet available for download and may still be in progress. The Nearby Galaxies Catalogue is suggested as a sufficient alternative.
  • #1
Daminc
39
0
Hi again,

I'm doing a bit of research about the positioning of the galaxies (the local group in particular) and I was wondering if there were any lists available where the cartisian coordinates were already calculated as apposed to translating them from the polar coordinate vectors.
 
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  • #2
I've found these if anyone's interested:

http://www.stellar-database.com/
Stars within 75 light-years

http://www.lazette.net/Vision/Issue14/wbputtingstars.htm [Broken]
Calculating coordinates and distance etc
 
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  • #3
The Tully database is probably your best bet.

- Warren
 
  • #4
Is it only available with Starry Night Pro v.4?
 
  • #5
Tully's collection of 2367 galaxies (Nearby Galaxies Catalogue, VII/145, 1998) is available everywhere, such as:

http://www.asc.rssi.ru/mdb/stars/7/7145.htm
http://xml.gsfc.nasa.gov/archive/catalogs/7/7145/ [Broken]

Here's another database, GOLDmine, which you might find useful:

http://arxiv.org/abs/astro-ph/0212257

I am unable to find the 28,000 galaxy Tully database in downloadable form. Several preprints have used Tully's data, but all give him as a reference via "personal communication." I suspect that this means he is not completely done with the data, and has not officially released it yet. Chances are the Nearby Galaxies Catalogue will be sufficient for your purposes.

- Warren
 
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1. What are galaxies?

Galaxies are large systems of stars, gas, dust, and dark matter bound together by gravity. They come in a variety of shapes and sizes, and can contain billions of stars.

2. How many galaxies are there?

It is estimated that there are about 100 billion galaxies in the observable universe. However, this number is constantly changing as we discover new galaxies through advanced telescopes and technology.

3. How are galaxies formed?

Galaxies are formed through a process of gravitational interactions and mergers between smaller structures. These interactions cause gas and dust to collapse and form new stars, eventually leading to the formation of a galaxy.

4. What types of galaxies exist?

There are three main types of galaxies: spiral, elliptical, and irregular. Spiral galaxies have a distinct spiral shape, while elliptical galaxies are more rounded and lack a defined shape. Irregular galaxies do not have a distinct shape or structure.

5. How do scientists study galaxies?

Scientists study galaxies using various methods, including visual observation through telescopes, measuring the light and spectra emitted by stars, and using computer simulations to model their formation and evolution. They also study the distribution and movement of galaxies through techniques such as redshift and gravitational lensing.

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