Some of them are substantial in size but it's almost impossible to see them in the forest because they only become visible when the sun is at the right angle.

BBC: Fossil finds in Leicestershire 'absolutely world class'

From that distance, a star like the sun is visible through binoculars.

FORBES: Searching for the Siblings of the Sun

The sun burns down so harshly that the contours of all visible items melt in its fierceness.

NPR: Somalia's Farah: Humanizing a Broken Place

The man was still watching, a flash of sun on the window glass hiding his mouth, but his forehead and eyes visible.

NEWYORKER: Brooklyn Circle

Now only visible with the largest ground-based telescopes or from space, 1999 RQ36 currently lies about one earth-sun distance away.

FORBES: New Observations Signal NASA Mission's Target Asteroid Is Sample-Friendly Rubble Pile

The all-carbon formula doesn't need to be thickly spread to do its work, and it simply lets visible light through -- it could layer on top of a traditional solar cell to catch many more of the sun's rays.

ENGADGET: All-carbon solar cell draws power from near-infrared light, our energy future is literally that much brighter