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ASP1010 - Earth to cosmos - introductory astronomy - S1 2026
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You have a strip of paper that is 1.5 m (150 cm!) long. You want to mark the distance from the Sun to Alpha Centauri
Using the table below, you must choose one linear scale (e.g., “1 cm = X ly”) that allows all three stars to fit on the strip. Assume that the Sun is marked at the edge of the strip.
Star
|
Type
|
Distance from Sun (ly)
|
Vega
|
A‑type main‑sequence
|
25
|
Arcturus
|
K‑type red giant
|
37
|
Polaris
|
F‑type supergiant
|
323
|
Antares
|
Red supergiant
|
550
|
Deneb
|
Blue‑white supergiant
|
2,600
|
Sirius
|
A‑type main‑sequence
|
8.6
|
Alpha Centauri
|
G/K‑type triple system
|
4.37
|
Betelgeuse
|
Red supergiant
|
642.5
|
Rigel
|
Blue supergiant
|
860
|
Aldebaran
|
K‑type red giant
|
65
|
Which option best describes the largest possible linear scale (in cm/ly) you would choose and the distances from the edge of the strip (in cm) you would mark for your three stars?
A student uses a scale of 7 m per light‑year.
Using the below table, how much farther from the Sun (in metres) would Arcturus be placed compared to Vega? Give your answer to the nearest whole metre. Do not write units in your answer.
Star
|
Type
|
Distance from Sun (light‑years)
|
Vega
|
A‑type main‑sequence star
|
25
|
Arcturus
|
K‑type red giant
|
37
|
Polaris
|
F‑type supergiant
|
323
|
Antares
|
Red supergiant
|
550
|
Deneb
|
Blue‑white supergiant
|
2,600 |
Why is a single linear scale useful for representing planets, stars, and galaxies all on the same diagram?
Stars come in many different types, and their diameters can vary enormously depending on their temperature, mass, and stage of evolution
The diameter of the Sun is , a blue supergiant star, is approximately
If you scale the Sun
so that its diameter is
40 cm, what is the scaled diameter of Rigel? Give your answer to the nearest whole metre. Do not write units in your answerA student creates a scale model in which Vega is placed away from the Sun.
Using the below data table, what scale (in metres per light‑year ) was the student using? Give your answer to the nearest whole number (no decimal places!) in m/ly. Do
Star
|
Type
|
Distance from Sun (light‑years)
|
Vega
|
A‑type main‑sequence star
|
25
|
Arcturus
|
K‑type red giant
|
37
|
Polaris
|
F‑type supergiant
|
323
|
Antares
|
Red supergiant
|
550
|
Deneb
|
Blue‑white supergiant
|
2,600
|
Students often underestimate distances in the Solar System. Based on the lab activities, what is the most likely reason?
A light‑year is larger than an astronomical unit (AU).
Why do astronomers use astronomical units (AU) instead of kilometres when describing distances in the Solar System? Select one:
Which of the following best reflects astronomy as a human endeavour?Select one:
Which of the following is an example of scientific evidence, rather than personal experience or cultural knowledge?Select one: