ASTR 4 · Dis 1C
Black Holes and Cosmic Catastrophes
Seats, time, final and grades
Seats
Closed.
30 of 30 enrolled.
Its lecture reads closed (90 of 90 enrolled): you attend both, so this seat is not one you can take while that holds. There is no waitlist either, so the only way in is somebody dropping the lecture.
Meets
F 4:00pm-4:50pm
This discussion only. You also attend Lec 1.
Final
Wed 9 Dec, 11:30am to 2:30pm
One exam for the whole class, Los Angeles time.
Read 14 hours ago.
Grades
313 letter grades, everyone who has taught ASTR 4.
Read 3 hours ago. The latest refresh is overdue. Seats and instructors may have changed since. Check the registrar before enrolling.
dibs has seen this section open 10 times since 17 August. The last time was 25 September. 7 of those were readings where the capacity figure moved and the enrolled count did not, so dibs could not tell whether a seat existed and did not send an alert.
Watching is the one thing here that needs an account, because an alert needs somewhere to go. Everything else on this page works signed out.
Put this class on a board
A board is one quarter you are drafting, so it needs an account to live in. Signing in brings you straight back to this page, with this class still in front of you.
Before you can enroll
From the registrar limited early, then open
Seats are held for entering students who enroll through New Student Orientation sessions beginning July 2, 2026. New student restrictions will be lifted on September 15, 2026 at 8 a.m.
The limit stands until 15 September, and lifts then. dibs still counts this class as one you can take, but not yet.
When it meets
Meets: F 4:00pm-4:50pm
Lecture: MWF 1:00pm-1:50pm
Physics and Astronomy Building 2748
Grades
Of the 3 people in the grade record for ASTR 4, the 2 with the most grades: SHAPLEY, ALICE EVE at 3.18 over 134 grades and LARKIN, JAMES E at 3.37 over 113 grades.
- A range
- 47%
- P/NP
- 16%
- D/F/W
- 5.4%
What students say
dibs measures outcomes: grades, seats, how fast it fills. For what the class is actually like to sit in, BruinWalk has the reviews.
What the work looks like
- Exams mentioned, no number given, said by 4 reviewers
- Quizzes mentioned, no number given, said by 2 reviewers
- Problem sets mentioned, no number given, said by 1 reviewer
Read from 64 reviews about 1 month ago. dibs counts only what a review actually states, so a kind of work nobody mentioned is absent rather than zero.
Will it still be here
high risk chance of closing before your enrollment pass.
Final enrollment per term from four years of grade data. Summer excluded: different population, different pass structure.
- 6522S
- 3222F
- 4423F
- 6724F
- 8325S
- 8525F
Peak 85 · most recent 25F at 85
Seats over time
Nothing read since 1 Oct, 3 hours ago. Over about 1 month before that, filled by 4.
10 times reopenedA dot is a reading where something moved: the seat count, the status, or the waitlist. Flat between dots joins recorded counts; changes between reads may be missed. The line starts when dibs first saw this section rather than reaching back before it existed. The last one is the last time dibs read this section, moved or not, and that was 3 hours ago. It is where the line stops, not where the count is now.
Show the readings (30)
| Recorded | Enrolled | Capacity | Status | Waitlist | Hours read |
|---|---|---|---|---|---|
| 1 Oct 16:42 | 30 | 30 | closed | - | 40 of 136 |
| 26 Sep 01:12 | 30 | 30 | closed | - | 3 of 8 |
| 25 Sep 18:12 | 29 | 30 | open | - | 2 of 5 |
| 25 Sep 14:42 | 30 | 30 | closed | - | 2 of 4 |
| 25 Sep 11:12 | 29 | 30 | open | - | 48 of 162 |
| 18 Sep 18:32 | 30 | 30 | closed | - | 2 of 4 |
| 18 Sep 15:12 | 29 | 30 | open | - | 19 of 60 |
| 16 Sep 04:12 | 30 | 30 | closed | - | 4 of 12 |
| 15 Sep 17:02 | 29 | 30 | open | - | 5 of 16 |
| 15 Sep 02:22 | 28 | 30 | open | - | 2 of 5 |
| 14 Sep 22:52 | 29 | 30 | open | - | 3 of 7 |
| 14 Sep 16:12 | 28 | 30 | open | - | 20 of 64 |
| 12 Sep 01:22 | 29 | 30 | open | - | 2 of 3 |
| 11 Sep 23:02 | 28 | 30 | open | - | 3 of 5 |
| 11 Sep 19:32 | 29 | 30 | open | - | 8 of 31 |
| 10 Sep 13:40 | 28 | 30 | open | - | 14 of 37 |
| 9 Sep 01:40 | 28 | 29 | open | - | 2 of 2 |
| 9 Sep 00:40 | 28 | 28 | closed | - | 2 of 3 |
| 8 Sep 22:40 | 28 | 29 | open | - | 5 of 93, 83 no hourly record |
| 5 Sep 02:40 | 28 | 28 | closed | - | no hourly record |
| 3 Sep 11:27 | 27 | 28 | open | - | no hourly record |
| 27 Aug 17:40 | 27 | 27 | closed | - | no hourly record |
| 24 Aug 19:55 | 26 | 27 | open | - | no hourly record |
| 24 Aug 17:55 | 26 | 26 | closed | - | no hourly record |
| 24 Aug 15:55 | 26 | 27 | open | - | no hourly record |
| 24 Aug 14:55 | 26 | 26 | closed | - | no hourly record |
| 24 Aug 12:55 | 26 | 27 | open | - | no hourly record |
| 24 Aug 11:55 | 26 | 26 | closed | - | no hourly record |
| 24 Aug 10:55 | 26 | 27 | open | - | no hourly record |
| 17 Aug 16:42 | 26 | 26 | closed | - | - |
How readings and alerts work
A reading and an hourly record are different things, and most charts here hold more of the second missing than present. dibs has taken readings of a section since long before it began keeping an hour-by-hour log of when it looked, so the empty stretches are dibs saying it was not keeping that log yet, not that it looked and found nothing. That is the age of the record and not a fault.
Seat counts show the last successful read, not live availability. Refreshes can be delayed by request limits or upstream interruptions. Watched sections receive priority, but an hourly update for every section is not guaranteed.
The registrar can change a seat count between our checks. Alerts depend on dibs detecting an opening and completing delivery; a quiet watch does not prove that no seat opened. Check the registrar before enrolling.
Class chat
Nobody on dibs watches this class or has it on a plan yet. Nobody has posted yet.
Dis 1C shares one room with Lec 1 and every other discussion under it, because that is what a student means by "my class".
Reading a room needs no account. Posting does, and it is free.