Question

which astronomical objects emit x - ray? choose all that apply. the sun planets supernova moons black holes pulsar

Explanation:

• Supernovae: During the explosion of a massive star (supernova), extremely high - energy processes occur. These processes can accelerate particles to high speeds and create shockwaves, which can emit X - rays.
• Black holes: Matter falling into a black hole forms an accretion disk. Friction and gravitational forces in the accretion disk heat the matter to extremely high temperatures (millions of degrees), causing it to emit X - rays.
• Pulsars: Pulsars are highly magnetized, rotating neutron stars. The strong magnetic fields and high - speed rotation can accelerate charged particles. These accelerated particles can emit X - rays, especially in regions like the polar caps of the pulsar.

The Sun also emits X - rays, mainly from its corona (the outer atmosphere). The corona is heated to very high temperatures (around 1 - 3 million degrees), and this hot plasma emits X - rays. Planets and moons, in general, do not have internal processes that generate significant X - ray emissions (although some planets may have very faint X - ray emissions due to interactions with the solar wind, but this is much less compared to the sources like supernovae, black holes, pulsars, and the Sun).

Answer:

supernova, black holes, Pulsar, the Sun