HW04 - big would it be 3 a In star cluster A the entire...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
PHY180 Homework 4 Henrikson Due April 3, 2006. Stars and Stellar Evolution. 1. a. A new planet was just discovered orbiting around a star called 51 Pegasi, which has a parallax of 0.074". What is its distance in parsecs? Light years? Astronomical Units (AU)? b. If 51 Pegasi were located at 10 parsecs, how bright would it appear to us on earth? (Compared to its present brightness) 2. a. If a star were half as hot as the sun, but the same luminosity, how big would it be? b. If a star were 100 times the luminosity of the sun, but the same surface temperature, how
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: big would it be? 3. a. In star cluster A the entire main sequence is represented, from spectral type O to M, while in cluster B, there are no stars hotter than spectral type F. What can you say about the relative ages of the two clusters, and why? b. In star cluster C, there are no stars COOLER than spectral type F on the main sequence. What can you say about the relative age of this cluster compared to the two in part A, and why?...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern