1 / 3

Characteristics of Stars

Characteristics of Stars. Constellations – imaginary patterns of stars Circumpolar – five constellations in the Northern Hemisphere that circle the pole star (Polaris). Classification of Stars. Stars are classified by their color, temperature, size, brightness, and composition.

gerodi
Télécharger la présentation

Characteristics of Stars

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Characteristics of Stars Constellations – imaginary patterns of stars Circumpolar – five constellations in the Northern Hemisphere that circle the pole star (Polaris) Classification of Stars • Stars are classified by their color, temperature, size, brightness, and composition

  2. Composition is determined by a spectrograph – a device that breaks light into colors and produces an image of the resulting spectrum Brightness depends on size and temperature and there are two types • Apparent – brightness as seen from Earth • Absolute – brightness the star would have if it were at a standard distance from Earth Measuring Distance Astronomers use light years – the distance that light travels in one year, about 9.5 million million kilometers Astronomers use parallax – the apparent change in position of an object when you look at it from different places

  3. Hertzsprung-Russell (HR) Diagram • graph used to determine a stars classification • it helps identify stars by color, size, temperature and brightness. • about 90% of stars fall on the main sequence. • the other 10% of stars were once main sequence stars. • can help determine where a star is in its lifecycle

More Related