What is a galaxy?
A vast collection of many billions of stars held together by gravity.
Cambridge IGCSE (9–1) Physics 0972 (Extended) (2026–2028) · 6.2.2
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What is a galaxy?
A vast collection of many billions of stars held together by gravity.
Which galaxy contains the Sun?
The Milky Way.
How do the distances from Earth to other stars in the Milky Way compare with the distance to the Sun?
Other stars in the Milky Way are much farther from Earth than the Sun is.
What is a light-year?
The distance light travels through a vacuum in one year.
What kind of distances are light-years used to express?
Astronomical distances.