Yes!
Yes!
both
A neutron star no longer produces energy - it is a dead star. It will gradually get colder, until it stops emitting any significant amount of heat. Any heat the neutron star radiates is residual heat - heat that was produced earlier, either through fusion, or through the tremendous gravitational collaps that produced the neutron star.
That would be the sun. It is a star and provides the light and warmth required to support life and flowing water.
That would be the sun. It is a star and provides the light and warmth required to support life and flowing water.
That would be the sun. It is a star and provides the light and warmth required to support life and flowing water.
a blue star is hotter then a red star because it is younger and thus has more energy. a good example of this is when you look at a flame on a lighter you see blue light at the bottom because blue is hottest and closest to the heat source whereas the red-orange flame at the top is farther away from the heat source and thus is not as hot as the blue.
The sun is the source of light and heat in our solar system. It is a star located at the center of the solar system, and its energy is essential for sustaining life on Earth.
Well, there are countless. In fact, any source of heat is also a source of light, although not always visible to the human eye. Nevertheless, a light bulb is a good example. Or the sun. Or any other star. Or, well, just name it...
A star's main source of fuel is nuclear fusion, specifically the fusion of hydrogen atoms into helium in its core. This process releases vast amounts of energy in the form of light and heat, which sustains the star's luminosity and temperature.
the sun is our source of heat
The energy produced by the star, which manifests itself as heat.