ASTR 4 · Dis 1A
Black Holes and Cosmic Catastrophes
Seats, time, final and grades
Seats
Closed.
30 of 30 enrolled.
Read 6 hours ago. The latest refresh is overdue. Seats and instructors may have changed since. Check the registrar before enrolling.
Meets
F 2:00pm-2:50pm
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 15 hours ago.
Grades
Predicted GPA
dibs has seen this section open 13 times since 17 August. The last time was 30 September. 4 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.
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What watching takes
Your setup, with any current hold shown beside the watch control.
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Your year
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When you can enroll
Set your appointment or acknowledge that an open seat may not be available to you yet.
A watch slot
25 per account. A lecture watch also covers its discussions. Paused watches still use a slot.
Before you can enroll
From the registrar
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 new-student hold ended on 15 September.
When it meets
Physics and Astronomy Building 2748
Grades
Predicted GPA
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, 4 mentions in past reviews
- Quizzes mentioned, no number given, 2 mentions in past reviews
- Problem sets mentioned, no number given, 1 mention in past reviews
Based on 64 reviews; source checked about 2 months 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 16 Oct, 6 hours ago. Over the 2 months before that, filled by 3.
13 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 6 hours ago. It is where the line stops, not where the count is now.
Show the readings (32)
| Recorded | Enrolled | Capacity | Status | Waitlist | Hours read |
|---|---|---|---|---|---|
| 16 Oct 17:52 | 30 | 30 | closed | - | 101 of 383 |
| 30 Sep 19:22 | 30 | 30 | closed | - | 5 of 15 |
| 30 Sep 05:22 | 29 | 30 | open | - | 64 of 247, 30 no hourly record |
| 19 Sep 23:42 | 30 | 30 | closed | - | no hourly record |
| 19 Sep 03:52 | 29 | 30 | open | - | no hourly record |
| 19 Sep 00:32 | 30 | 30 | closed | - | no hourly record |
| 18 Sep 22:02 | 29 | 30 | open | - | no hourly record |
| 15 Sep 17:02 | 30 | 30 | closed | - | no hourly record |
| 13 Sep 02:52 | 29 | 30 | open | - | no hourly record |
| 12 Sep 01:22 | 30 | 30 | closed | - | no hourly record |
| 11 Sep 23:02 | 28 | 30 | open | - | no hourly record |
| 11 Sep 19:32 | 30 | 30 | closed | - | no hourly record |
| 11 Sep 15:40 | 28 | 30 | open | - | no hourly record |
| 10 Sep 13:40 | 29 | 30 | open | - | no hourly record |
| 10 Sep 01:40 | 29 | 29 | closed | - | no hourly record |
| 9 Sep 01:40 | 27 | 29 | open | - | no hourly record |
| 9 Sep 00:40 | 27 | 28 | open | - | no hourly record |
| 8 Sep 22:40 | 27 | 29 | open | - | no hourly record |
| 7 Sep 01:40 | 27 | 28 | open | - | no hourly record |
| 3 Sep 01:40 | 28 | 28 | closed | - | no hourly record |
| 27 Aug 17:40 | 27 | 28 | open | - | no hourly record |
| 21 Aug 01:55 | 28 | 28 | closed | - | no hourly record |
| 20 Aug 23:55 | 27 | 28 | open | - | no hourly record |
| 20 Aug 21:55 | 28 | 28 | closed | - | no hourly record |
| 20 Aug 20:55 | 27 | 28 | open | - | no hourly record |
| 20 Aug 17:55 | 28 | 28 | closed | - | no hourly record |
| 19 Aug 17:55 | 27 | 28 | open | - | no hourly record |
| 19 Aug 15:55 | 27 | 27 | closed | - | no hourly record |
| 19 Aug 14:55 | 27 | 28 | open | - | no hourly record |
| 19 Aug 13:55 | 27 | 27 | closed | - | no hourly record |
| 19 Aug 11:55 | 27 | 28 | open | - | no hourly record |
| 17 Aug 16:42 | 27 | 27 | closed | - | - |
How readings and alerts work
Dated seat counts can be available even when hourly check history is missing. Gaps do not show whether seats changed between observations.
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 1A 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.