Where does the gravity go?

The problem with this is that there aren't enough light around to account for the missing mass. As was pointed out earlier, fusion in a star convert very little mass into a lot of energy, relatively. If we invent a measuring instrument so sensitive that we can measure the affect a very massive object has on light, we can effectively measure how much gravity light has.This is because F = Gm1m2/r^2Normally, we only put the mass of the object into account. However, if we have a instrument sensitive enough, we can also put light into account.

Current estimates reveal that about 25-30% of the universe is made of the visible matter, about 30-35% is made of dark matter, and about 60-65%ish is made of dark energy.Some people may disagree whether it is 30 or 30.5 or whatever, but as you can see visible matter only make up a tiny portion of our universe.Astronomers in the early 20th century estimated that invisible stuff they called dark matter occupied up to 90% of our galaxy. If you want, I can give a more detailed explanation to how astronomers came up with these calculations.This message has been edited by Troy, 05-09-2005 09:58 PM

Everything is a rough estimate.

You're probably right. It's been a while since I checked the info.Are machos considered baryonic or non-baryonic matter?