Sun
Videos
The Sun is the star located at the centre of the Solar System. It is a massive sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy from its surf
The Sun as viewed through a clear solar filter
Size comparison of major celestial objects in the Solar System, including the Sun. Distances are not to scale.
The photosphere is structured by convection cells referred to as granules.
The Sun's transition region taken by Hinode's Solar Optical Telescope
White dwarf
Videos
A white dwarf is a very dense type of star: in an Earth-sized volume, it packs a mass that is comparable to the Sun. A white dwarf radiates light from residual heat and eventual crystallization, not f
Artist's impression of debris around a white dwarf
Comet falling into white dwarf (artist's impression)
Artist’s impression of WD 1856b
Artist's impression of the WD J0914+1914 system