Itâs Not the Needle That Hurts. I believe the pain is due to the solution used to clean the eye prior to the injection and not the needle itself. The solution is called âBetadineâ and is commonly used to cleanse the eye prior to intraocular injection. Most retina specialists use this a part of their routine.
For numerical convenience, an object brighter than 0th magnitude has a negative magnitude; the brightest star, Sirius is magnitude -1.4; the full moon is magnitude -13, and the Sun is a blazing -26th magnitude.
In fact, there are only 8 other stars that appear brighter than Betelgeuse. In terms of the galaxy, Betelgeuse is a youngster at only around 10 million years. It is a red supergiant, meaning that during its time on the main sequence, it was one of the biggest stars in the galaxy.The peculiar thing about huge stars is that they are extremely short-lived.n fact, there are only 8 other stars that appear brighter than Betelgeuse. In terms of the galaxy, Betelgeuse is a youngster at only around 10 million years. It is a red supergiant, meaning that during its time on the main sequence, it was one of the biggest stars in the galaxy.