A black hole. Nothing gets out of it; but because of interactions with the matter around it, black holes can still be the brightest objects in the Universe! Do some reading on quasars, for more details.
A star emits light. Our Sun is a star.
a dead one
It is a star, so it emits light.
Yes. Polaris is a star and stars emit light. It's commen name is the Northern Star. ami http://en.wikipedia.org/wiki/Polaris
The star that is so cool (cold) that it does not emit light and so is invisible.
The core would emit light because it is hot. The outer atmosphere would absorb light because it is not completely transparent. It would also re-emit radiation itself, because of its heat.
Stars emit photons as a process of Nuclear fusion.
A star emits light through the process of nuclear fusion in its core. This light then travels through space and can be observed from far distances. Some of this light may also get reflected off planets or other objects in space.
No. Every star you see produces its own light, just as the sun does. Which isn't surprising when you recall that the sun is a star.
No, stars are distant celestial objects that emit their own light, while moons are natural celestial objects that orbit planets. A star cannot transform into a moon based on the observer's location. A purple star does not exist in reality, as stars emit light in a range of colors based on their temperature.
dose scientific calculator emit sinewaves
Light bulbs emit light.