Question
This galaxy is connected to the Triangulum Galaxy by a stream of hydrogen that may indicate a past interaction. For 10 points each:
[10e] Name this second-largest spiral galaxy in the Local Group, which will merge with the Milky Way in four-to-five billion years.
ANSWER: Andromeda galaxy [or M31]
[10h] This component of the Milky Way was likely created by a merger early in its history. This hypothetical component is home to older stars and contains a smaller, similarly named component.
ANSWER: thick disk [prompt on disk] (The thick disk contains the thin disk.)
[10m] Edwin Hubble showed that Andromeda is a distinct galaxy by observing these stars. These variable stars are useful as standard candles due to their tight period–luminosity relation.
ANSWER: Cepheid variables [or Cepheids; or Cepheid variable stars]
<Forrest Weintraub, Science - Astronomy> ~22548~ <Editor: David Bass>
Data
Summary
| Tournament | Edition | Exact Match? | Heard | PPB | Easy % | Medium % | Hard % |
|---|---|---|---|---|---|---|---|
| 2024 PACE NSC | 06/08/2024 | Y | 36 | 16.39 | 97% | 67% | 0% |