Astrophysics Homework 1 ( from past paper)
Mark Scheme
Knowing that the angle at T is 10 deg or 1/2 T is 5 deg (1)
Use of Tan with any angle and using 10m as base (1)
114 m (1)
(i) (annual) parallax (1)
(ii) diameter of Earth's orbit around the sun (or on a diagram) (1)
(iii) (direction or background of more) distant stars (1)
Most stars are too distant (1)
Parallax is too small (to measure) (1) [not difficult]
This homework is now closed
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