|
You've got make them 'blink' for you, as sometimes they're stellar in their appearance and look just like a star. You make them 'blink' by looking straight at them - and they should disappear - then look away - and it should pop back into your averted vision. They're often very diffuse and faint and not picked up by the cones in the centre of your eye, the bright light and colour section, but the rods that detect shades of light around the edges of your eye should see them.
And they often have a distinctive blue-green colour to them, at least the bright easy ones do.
I doubt your 6" would get the Crab unless you were in a good dark sky, it can be an *ahem* of a difficult object at the best of times.
|