The answer completely depends on what "close" means.
There would be a big difference between 95% and 96%.
They are antonyms
That will completely depend on where the Earth and the comet are in their respective orbits. No single answer is possible.
The sun rising every morning. Its' light traveled about 93,000,00 miles through a vacuum in order to be seen.If you accept that the space between the Earth and the Moon is lacking in atmosphere, that is, its a pretty good vacuum, then the simple fact that you can see the Moon (and Sun and Stars) is enough proof for me.
The distance light must travel is the distance from Sun to Earth - about 150 million km.
It is because light can travel through space that Earth can get sunlight. Without sunlight life on Earth could not exist.
Very close to 1000 light-seconds.
Electrons are able to travel close to speed of light.
Because it is bright but more importantly, it is relatively close to Earth - a mere 8.6 light years from us, which is close in star terms.
The diaphragm controls the amount of light going through the microscope. If you close it, less light will come through. If an object is light in color, this can help you see it better. If you open it, more light will come through. That will help with darker objects.
light travels from sun to earth through vaccum, so its easily understood
Light can travel through space. All the light that we get on the earth's surface; usually travels from the sun through space before it can reach here.
There is a black hole close to Earth, yes. It is 1,600 light years away.