a) Which row of the table shows these objects in the correct order of size? Put a cross (X) in the box next to your answer - Edexcel - GCSE Physics - Question 3 - 2013 - Paper 1

The images produced by telescopes on Earth are less clear than those from space primarily due to atmospheric interference. The Earth's atmosphere can distort light from celestial bodies because of air turbulence, water vapor, and other particles, which can cause blurring and color distortion. In contrast, telescopes in space are above the atmosphere and can capture clearer, more detailed images without these interferences.

The redshifts observed in the light from galaxy 1 and galaxy 2 predict that both galaxies are moving away from the Earth. The greater the redshift, the faster they are receding, which is often interpreted as evidence of the expansion of the universe. This implies that both galaxies are likely at a significant distance from Earth, and their movement suggests they are part of an expanding cosmos.

For stars much more massive than the Sun, the process of star formation begins similarly with a protostar developing from a nebula. As the protostar accumulates more mass, it becomes a main sequence star, where nuclear fusion occurs. Once it exhausts its hydrogen fuel, it can expand into a supergiant. Eventually, the supergiant undergoes a supernova explosion, leading to the formation of either a neutron star or a black hole, depending on its remaining mass. More massive stars tend to have shorter lifespans due to the rapid consumption of their fuel compared to less massive stars.