Lecture22 - Astro Nova Black Hole in Omega Centauri HST...

Astro Nova
Black Hole in Omega Centauri
HST images
Gemini stellar velocities
40,000 M
Sun
black hole
dwarf galaxy, not globular cluster?
Saturday 4/12 was International
Sidewalk Astronomy Night
Russia to build new cosmodrome
2015 completion

Final Exam
Wednesday May 14
9:00 am – 10:30 am
Physics Lecture Hall
Closed book and notes
Computer-graded multiple-choice questions
Material covered:
Text chapters 22 - 27
Lectures 15-27 (March 13 through May 1)
Bring Student ID card and a #2 pencil
Practice Exam on class web page soon

Makeup Final Exam
Monday May 12, noon – 1:30 pm
SEC 203
Same format & coverage as regular exam
Only for those with verified exam conflicts or
Dean’s notes

Extra Credit
Submit multiple-choice questions for final exam (with
5 answer choices).
Email submission preferred
Deadline: 5 pm Monday, May 5
Accepted questions replace low quiz scores with
perfect scores – up to 2 quizzes replaced

Quiz Question #1
An object with M/L = 100 is mostly made of:
A. Upper main sequence stars
B. Solar-type stars
C. Lower main sequence stars
D. Luminous matter
E. Dark matter

Quiz Question #2
What is the largest scale structure in the
Universe?
A. There is no “largest structure” – every time we
look deeper into the universe we see larger scale
structures.
B. Superclusters, filaments, and voids
C. Rich galaxy clusters
D. cD galaxies
E. Gravitational lenses

Quiz Question #3
How does the Sloan Digital Sky Survey make a 3-D
map of the universe?
A. By measuring galaxy distances with Cepheid variable
stars.
B. By measuring galaxy distances using their redshifts .
C. By measuring galaxy distances using supernovae type
Ia.