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Why are objects in space visible if they do not emit their own light?
The part of the sun that is going to emit the most visible light is going to be the Photosphere
planets, moon,etc do not emit light on their own.
When the wavelength of a spectral line emitted from an object increases which end of the visible light spectrum does not move toward and what is the objects motion relative to earth?
Increasing wavelength is an indication of a Doppler shift caused by an object moving away from the viewer. Longer wavelengths (of the visible spectrum) are redder, shorter wav…elengths are bluer. Objects moving away from you have a red shift, objects moving toward you have a blue shift.
They don't directly emit light, but anything falling into them will emit strong electromagnetic radiation - due to the acceleration of the matter falling into the black hole. …Also, the black hole attracts all matter near it.
Black holes do not, themselves, emit light. But the area around them does. Not light as we think of it, but highly energetic X-rays caused by the mass AROUND the black hole as… the matter spirals down into the black hole. As the matter falls in to the black hole, the gravity accelerates the mass to near lightspeed, and the matter - dust and gas, as nothing larger could survive the tidal forces - collides with other dust and gas particles and gives off X-rays. So while we cannot directly observe a black hole, we CAN observe the X-rays with no apparent source. The first black hole ever "discovered" was Cygnus X-1 - a strong X-ray source in the constellation Cygnus from which we couldn't see the star generating the X-rays.
The sun and the stars is all i can think of.
It must either reflect light, as in the case of the Moon under ordinary circumstances, or block light, as in the case of the Moon during a solar eclipse. Of course in everyd…ay life, almost everything we see on Earth is seen by reflected light. PS: in reality, every object with a temperature above absolute zero, in other words, every object, emits light in the form of infrared radiation. We just can't see it without instruments or special cameras.
I have only one body to answer this question. That is a star. The star uses nuclear fusion, which is emiting light.
In The Moon
The Sun. And also: when electrons go from excited state back to ground level, the energy that they had transforms into light which is given off.
sun, stars, galaxies, nebulae, and meteors