Halley's Comet is currently moving away from both the Sun and the Earth along its highly eccentric orbit, meaning light or radio transmissions emitted from its vicinity display a red-shift when observed from Earth.
Describe how the wavelength and frequency of these signals change when viewed from the Earth because of this red-shift.
The average orbital radius of Saturn is approximately 1.43 × 106 megametres (Mm).
Which of the following is equivalent to this distance in metres (m)?
Recently, some planetary scientists reported observations of anomalous orbital perturbations in Kuiper Belt objects that do not fit current gravitational models of the outer solar system. Explain why it is important for these new observations to undergo peer review before they are widely accepted.
Practise AQA GCSE Physics Solar system; stability of orbital motions; satellites (physics only) with exam-style questions for Foundation and Higher tier. 27 questions covering Our solar system, The life cycle of a star, and Orbital motion, natural and artificial satellites, matched to the AQA GCSE Physics (8463) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.