Most of the energy emitted by stars like our Sun lies within three adjacent regions of the electromagnetic spectrum.
State these three regions of the electromagnetic spectrum.
Electromagnetic radiation from a star travels through space at a speed of 3.0×108 m/s3.0 \times 10^8 \text{ m/s}3.0×108 m/s. It takes 2500 s2500 \text{ s}2500 s for this radiation to reach a newly discovered exoplanet. Calculate the distance from the star to the exoplanet.
Stars form from large interstellar clouds of gas and dust.
Describe and explain the process by which an interstellar cloud of gas and dust becomes a protostar.
Describe and explain the changes that occur as a protostar transitions and becomes a stable main sequence star.
25 exam-style questions on CIE IGCSE Physics 6.2.2a Galaxies and astronomical distances. Each one has a worked solution and a mark scheme showing where the marks go.