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ASTR 3 · Lec 2

Nature of the Universe

Fall 2026Shapley, A.E.5 units

Seats, time, final and grades

Seats

Open, 17 seats left.

128 of 174 enrolled, lecture and all discussions summed.

Subtract those two and the lecture has 46 places in it. The 17 seats above are what is open in the discussions, and you enroll in a discussion, so that is the figure that decides whether you get in.

Meets

MWF 11:00am-11:50am

Lecture only. You also attend a discussion, listed below.

Final

Mon 7 Dec, 11:30am to 2:30pm

One exam for the whole class, Los Angeles time.

Read 14 hours ago.

Grades

3.14
predicted, this instructor · 240 grades

240 letter grades, Shapley, A.E..

Read 71 minutes ago. This is a recent reading, not a live seat count.

Enroll on the registrar (opens in a new tab) Sign in to watch for an opening

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.

Discussions

You enroll in the discussion, not the lecture, so the seat figure above is the sum across all of them and can read open while every discussion you could actually join is full.

5 discussions, 4 open: Lab 2B, T 10:00am-11:50am, Lab 2C, T 12:00pm-1:50pm, Lab 2D, W 8:00am-9:50am, and Lab 2E, R 10:00am-11:50am.

  • Lab 2A

    M 8:00am-9:50am

    No instructors

    Cancelled.

  • Lab 2B

    T 10:00am-11:50am

    Magari, N.P.

    Open, 4 seats left.

  • Lab 2C

    T 12:00pm-1:50pm

    Zweig, E.A.

    Open, 2 seats left.

  • Lab 2D

    W 8:00am-9:50am

    Magari, N.P.

    Open, 2 seats left.

  • Lab 2E

    R 10:00am-11:50am

    Nagarajan, N.

    Open, 9 seats left.

  • Lab 2F

    R 12:00pm-1:50pm

    Nagarajan, N.

    Closed.

When it meets

Mon
Tue
Wed
Thu
Fri
6am
7am
8am
9am
10am
11am
12pm
1pm
2pm
3pm
4pm
5pm
6pm
7pm
8pm
9pm
10pm

Meets: MWF 11:00am-11:50am

Discussions: T 10:00am-11:50am · T 12:00pm-1:50pm · W 8:00am-9:50am · R 10:00am-11:50am

Physics and Astronomy Building 1425

Grades

3.14
predicted, this instructor · 240 grades

Of the 10 other people in the grade record for ASTR 3, the 2 with the most grades: TURNER, JEAN L at 3.38 over 398 grades and LARKIN, JAMES E at 3.20 over 381 grades.

A range
40%
P/NP
9%
D/F/W
3.3%

Full grade history for ASTR 3

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.

Workload, light. 3.7 of 5 for Alice Shapley, where 5 is lightest. Read about 1 month ago.

dibs has read this course’s reviews and none of them say what kind of work it sets, so dibs has nothing to show rather than a guess. Read from 376 reviews about 1 month ago. That is the reviewers being silent, and not a course that sets no work.

ASTR 3 reviews for Alice Shapley Reviews for all professors of ASTR 3

Will it still be here

medium 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.

  • 15721F
  • 15522W
  • 7122S
  • 11922F
  • 15323W
  • 8523S
  • 13823F
  • 14124W
  • 16024S
  • 11624F
  • 12925W
  • 10025S
  • 11825F
Enrollment by term: 21F 157, 22W 155, 22S 71, 22F 119, 23W 153, 23S 85, 23F 138, 24W 141, 24S 160, 24F 116, 25W 129, 25S 100, 25F 118

Peak 160 · most recent 25F at 118

Seats over time

Filled by 28 over about 2 months

128 of 174 · 17 left in its discussions
17 Aug 12:329 Sep 02:371 Oct 16:42
dibs read 168 of the 556 hours its hourly record covers, 30%, and did not look in 388. dibs had no hourly record before 8 Sep, which is the other 529 of 1085 plotted.128 of 174 enrolled at the newest reading, 71 minutes ago, with 17 left in its discussions. Seats from 17 Aug 12:32 to 1 Oct 16:42, 100 to 128. dibs read 168 of the 556 hours its hourly record here covers, 30%. An hour marked as read confirms a check, not continuous monitoring. That check recorded no change; changes between checks may be missed. For 388 hours dibs was keeping a record and did not reach this section. Nothing before 8 September at 13:00, where this section's record starts, has a read either way, which is 529 hours of this window. Where the drawing is faint or broken, that never means the readings are doubtful. It means the stretch between them is unaccounted for.

A 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: 71 minutes ago.

Show the readings (84)
Recorded Enrolled Capacity Status Waitlist Hours read
1 Oct 16:42 128 174 open - 7 of 22
30 Sep 19:22 128 174 open - 9 of 30
29 Sep 14:22 127 174 open - 2 of 4
29 Sep 11:12 126 174 open - 10 of 32
28 Sep 04:32 127 174 open - 2 of 4
28 Sep 01:02 126 174 open - 15 of 49
26 Sep 01:12 127 174 open - 3 of 8
25 Sep 18:12 130 174 open - 2 of 5
25 Sep 14:42 131 174 open - 2 of 4
25 Sep 11:12 130 174 open - 4 of 12
25 Sep 00:22 131 174 open - 3 of 7
24 Sep 18:12 133 174 open - 4 of 12
24 Sep 07:42 130 174 open - 2 of 4
24 Sep 04:12 131 174 open - 5 of 15
23 Sep 14:42 133 174 open - 5 of 14
23 Sep 01:32 132 174 open - 2 of 4
22 Sep 22:02 139 174 open - 2 of 5
22 Sep 18:32 133 174 open - 7 of 21
21 Sep 22:02 139 174 open - 9 of 29
20 Sep 18:12 138 174 open - 12 of 40
19 Sep 03:52 136 174 open - 2 of 4
19 Sep 00:32 135 174 open - 3 of 7
18 Sep 18:32 136 174 open - 6 of 18
18 Sep 01:12 135 174 open - 3 of 7
17 Sep 19:22 137 174 open - 2 of 5
17 Sep 15:52 136 174 open - 3 of 5
17 Sep 11:12 137 174 open - 4 of 12
17 Sep 00:52 136 174 open - 3 of 8
16 Sep 17:52 137 174 open - 5 of 14
16 Sep 04:12 138 174 open - 4 of 12
15 Sep 17:02 139 174 open - 5 of 16
15 Sep 02:22 136 174 open - 2 of 5
14 Sep 22:52 137 174 open - 3 of 7
14 Sep 16:12 136 174 open - 13 of 41
13 Sep 00:32 137 174 open - 3 of 7
12 Sep 18:32 138 174 open - 2 of 4
12 Sep 15:02 137 174 open - 5 of 15
12 Sep 01:22 138 174 open - 2 of 3
11 Sep 23:02 134 174 open - 2 of 3
11 Sep 21:32 138 174 open - 9 of 33
10 Sep 13:40 134 174 open - 5 of 13
10 Sep 01:40 134 165 open - 10 of 25
9 Sep 01:40 127 165 open - 2 of 2
9 Sep 00:40 127 157 open - 2 of 3
8 Sep 22:40 127 165 open - 5 of 21, 11 no hourly record
8 Sep 02:40 127 157 open - no hourly record
7 Sep 01:40 126 157 open - no hourly record
5 Sep 02:40 127 157 open - no hourly record
3 Sep 11:27 115 157 open - no hourly record
3 Sep 01:40 115 149 open - no hourly record
31 Aug 01:40 109 149 open - no hourly record
30 Aug 22:40 110 149 open - no hourly record
30 Aug 21:40 109 149 open - no hourly record
28 Aug 01:40 110 149 open - no hourly record
27 Aug 22:40 109 149 open - no hourly record
27 Aug 21:40 110 149 open - no hourly record
27 Aug 20:40 109 149 open - no hourly record
27 Aug 19:40 110 149 open - no hourly record
27 Aug 01:55 109 149 open - no hourly record
27 Aug 00:55 110 149 open - no hourly record
26 Aug 22:55 109 149 open - no hourly record
26 Aug 02:40 110 149 open - no hourly record
26 Aug 01:40 111 149 open - no hourly record
26 Aug 00:40 112 149 open - no hourly record
25 Aug 23:40 102 149 open - no hourly record
25 Aug 20:40 112 149 open - no hourly record
25 Aug 19:55 102 149 open - no hourly record
25 Aug 18:55 114 149 open - no hourly record
24 Aug 10:55 102 149 open - no hourly record
22 Aug 00:55 102 140 open - no hourly record
21 Aug 23:55 101 140 open - no hourly record
21 Aug 22:55 102 140 open - no hourly record
21 Aug 21:55 101 140 open - no hourly record
21 Aug 20:55 102 140 open - no hourly record
21 Aug 19:55 101 140 open - no hourly record
21 Aug 18:55 102 140 open - no hourly record
21 Aug 01:55 101 140 open - no hourly record
20 Aug 17:55 102 140 open - no hourly record
19 Aug 17:55 100 140 open - no hourly record
19 Aug 15:55 100 131 open - no hourly record
19 Aug 14:55 100 140 open - no hourly record
19 Aug 13:55 100 131 open - no hourly record
19 Aug 11:55 100 140 open - no hourly record
17 Aug 12:32 100 131 open - -
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

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