homework help.. please??

Question

okay so i was asked this for asronomy class, and every were i go to lok it up im gettin complete different answeres.. so ne little bit of information can help THANKS!!

Find out what astronomers were responsible for stellar (star) classification. Discuss when, how, and why they did this classification and what it tells us about different stars.


~*~*~~THANK YOU SO MUCH~*~*~

Answer 1

Danish astronomer Ejnar Hertzprung and U.S. astronomer Henry Norris Russell, the H-R Diagram. Stars are placed on this diagram according to their luminosity and spectral type (OBAFGKM). Depending where they are on the chart, you can approximate a star's age, temperature, size, color, and source of energy (fusion). They will also be categorized into Main Sequence (V), Giants (III), Supergiants (I) , or White Dwarfs (wd). This is just a simplified version, adequate for a lower-level Astronomy class.

Answer 2

Charles Messier (June 26, 1730 - April 12, 1817)

His most important work, however, was the compilation of his Catalog of Nebulae and Clusters of Stars, which he created in order to list those nebulous objects which might be easily confused with comets, in the telescopes of his days. The final published version of the catalog contained 103 entries, but the modern version of this list has been extended to 110 objects, the seven additional objects added from notes of Charles Messier and Pierre Méchain, who at that time collaborated with him. Of these deepsky objects, Messier originally discovered 39 or 40, and independently re- (or co-) discovered at least 10; Pierre Méchain originally discovered 29 and co-discovered 1 of the objects in Messier's catalog.



Mark's Dad

Answer 3

The scientists responsible for star classifications (at least initially) were Hertzsprung and Russell.

Answer 4

Since you don't know how to Google, can you read the article I found for you?

Answer 5

You rock, LindaJune!

It was RIGHT at the tip of my tounge (right).