Jun 17, 2012 · What causes us to "see stars" when we bash our heads? I also notice the same phenomenon when I stand up suddenly and feel light-headed when blood pools in my legs. This is …

Jan 16, 2011 · Sarah - Is that also a little bit like if you rub your eyes too hard and you start seeing little lights popping all over because the pressure in your eye is activating the photoreceptors? Chris - …

Oct 3, 2010 · If I am in a dark room and I rub my closed eyes, why does it appear that I see bright lights or vivid color patterns? I have been enjoying your podcasts for a couple of years. My commute to …

Feb 10, 2008 · Sometimes when I stand up or I exert myself I see little white lights or firework displays in my vision. What is that?

Jun 13, 2017 · You see there are blue stars, and yellow stars, and red stars, and white stars but yet, curiously, there aren’t any green stars, and the colour of stars is related to their temperatures.

Apr 29, 2019 · Why is it that when you look directly at small faint stars they disappear, but when you look at a point near them, you can see them again?

Mar 13, 2011 · After looking at the direct above sun for less than 3 mins, I see a gray ball when looking direct to my text and even when looking direct to someone. Like can’t get my center view clearly ! …

Apr 30, 2019 · How come you can't see faint stars when you look directly at them?

Mar 2, 2015 · Seeing the stars with spectroscopy Spectroscopes have been used to discover what stars and planets are made of, as well as to find new elements here on earth. 02 March 2015

Jun 28, 2024 · Thanks to Matt Bothwell for the answer! James - Galaxies are systems of stars, gas and dust orbiting around a centre of mass. In the case of large galaxies, like our own Milky Way, more …