| Date | November 2010 | Marks available | 2 | Reference code | 10N.3.SL.TZ0.E1 |
| Level | Standard level | Paper | Paper 3 | Time zone | Time zone 0 |
| Command term | Distinguish | Question number | E1 | Adapted from | N/A |
Question
This question is about the characteristics of the stars Procyon A and Procyon B.
The stars Procyon A and Procyon B are both located in the same stellar cluster in the constellation Canis Minor. Distinguish between a constellation and a stellar cluster.
Constellation:
Stellar cluster:
Markscheme
constellation:
a collection/group of stars that form a recognizable pattern (as viewed from Earth) / a group/pattern of stars not close together (in space);
stellar cluster:
a group of stars (including gas and dust) held together by gravity/forming a globular/open arrangement / a group of stars close to each other (in space);
Examiners report
A large number of candidates were able to correctly distinguish between a constellation and a stellar cluster.
