Astronomy 16 – Astrophysics: Stars, ISM, and Galaxies

Prof. David Cohen

Fall 2018
Tu., Th. 11:20 to 12:35
SC 113 (seminar room)


spectral types M 43 Andromeda





posted 9/17

The first colloquium of the semester is this Friday at 12:30 in SC 199. Pizza will be provided! The talk is by our own Prof. Michael Brown, who'll be telling us about plasma physics experiments he and his group have been doing to study compression and turbulence in plasmas. This has applications for the Sun's corona, interstellar gas, and other astrophysical systems. Please come to the talk if you can. The talk tile is "Turbulence and Compression Studies on the SSX Plasma Wind Tunnel."

posted 9/16

There is no lab meeting this week.

Archive of old announcements


posted 9/18

The assignment for class 6 [pdf] covers the same material – the first four sections of Ch. 5.

You can look over the slides shown at the beginning of class 5 [pdf] as well as my solution to the in-class problem [pdf]. Oh, and my solution to the challenge problem on the back [pdf] (that we didn't discuss in class).

NGC 2442

posted 9/17

The third homework [pdf] is available and due on Sunday afternoon.

posted 9/16

The assignment for class 5 [pdf] covers the first four sections of Ch. 5.

Archive of old assignments

Upcoming Events

What's up in the sky this week - the sky is always changing: keep an eye on the bright objects that are up in the sky each night.

The department has regular talks – colloquia – given by visiting scientists. Check the department colloquium schedule to see the list of talks. You'll find titles and descriptions of the talks, which are generally on Fridays at lunchtime. We will have four or five this semester, with at least one on astrophysics.


Class Information

Prof. Cohen's office hours will generally be: Wednesday from 3:00 to 4:30, Thursday from 1:30 to 3:00 and Friday from 3:30 to 4:30; weekly deviations from this schedule will be posted here.

Katie and Graham, our SAs, will hold a weekly SA session on Thursday nights, from 7 to 9 pm, in L32.

Prof. Cohen's office is SC 125 and his lab is SC 124, right across the hall; Prof. Jensen's office is next door, in SC 123. Prof. Jensen is the lab instructor; we'll be having lab meetings on (some) Tuesday nights throughout the semester.

A syllabus [pdf] with information about the class as well as a schedule of topics, reading, labs, and exams is available – note that it will be periodically updated.

Please also read these guidelines about the class [pdf], including rules for the classroom but also information about the growth mindset and about equity and inclusion


Astronomy Picture of the Day

Messier Monday blog


AstroImageJ (AIJ) telescope data analysis software


gravity simulator

a Java-free orbit simulator


using your hands to measure angles


observatory website

department website



This page is maintained by David Cohen
dcohen1 -at-

Last modified: September 18, 2018