'10 6 stars' diaporamas de présentation

Chemical evolution in the MW Observational evidence

906 views • 76 slides

Measuring the Stars

Measuring the Stars. How big are stars? How far away? How luminous? How hot? How old & how much longer to live? Chemical composition? How are they moving? Are they isolated or in clusters?. How Far Away are the Stars?. Earth-baseline parallax - useful in Solar System.

623 views • 46 slides

Review of Sunspots

Review of Sunspots. They are darker because they are cooler (4500 K vs. 5800 K). Related to loops of the Sun's magnetic field. radiation from hot gas flowing along magnetic field loop at limb of Sun. Above the photosphere, there is the chromosphere and. The Corona.

453 views • 34 slides

7. Globular clusters 8. Galactic rotation 8.1 From halo stars

7. Globular clusters 8. Galactic rotation 8.1 From halo stars 8.2 From disk stars – Oort’s constant, A. 47 Tucanae. ω Centaurii. Globular clusters Large star clusters of roughly spherical shape Each cluster contains 10 5 to 10 6 stars

368 views • 22 slides