We are able to see the moon, the sun, the distant stars, etc., not because the one is 3 seconds away, the other 8 minutes away, and the last many light years away, but simply because these objects are large enough to be seen at their great distance when enough light is present.
If this is true, how is it that a telescope allows us to see stars that are not visible to the naked eye?
If we look at a particular patch of night sky, we see a certain number of stars in a given area with our naked eyes, but if we look at the same patch of sky through a telescope, we see more stars - the ones we could see before, plus some extra ones we couldn't see before.
The stars do not change their size, nor their luminosity, when viewed through a telescope.
According to the mainstream theories of optics, a telescope collects light over a larger area than the naked eye does - it takes the light incident upon a large 'objective lens' (or mirror), and concentrates that light by angling it into the eye. It literally works ONLY because seeing a star requires light to travel from the star to the eye.
No star is less than 1.6x10
29kg, or 160,000,000,000,000,000,000,000,000 tonnes; No star is less luminous than 8x10
-7L⊙, or 300,000,000,000,000,000,000W. So they are not invisible because they lack size or luminosity.
According to mainstream physics, these stars are initially invisible because the number of photons arriving at the retina is too low to trigger a signal in the optic nerve; And they become visible because the telescope catches photons over the larger area of the objective lens (or mirror), and directs them all to the pupil, so more photons arrive at the eye via the telescope directing them into the pupil, than arrive at the unaided pupil.
According to Lessans, these stars should always be visible, with or without a telescope, as they are very large, very luminous, and in our visual field. But they are not. So how can we explain this observation, if we accept Lessans's claim that luminosity and size are the sole criteria that determine their visibility?