70%
About 70 percent of the mass of the Milky Way has yet to be discovered by scientists. This missing mass is known as dark matter, which exerts gravitational forces but does not emit or block light, making it difficult to detect.
they have discovered dinosaur bones and much more such as crystals
Comparable, in what sense? - Scientists have discovered over a thousand planets outside our Solar System; most of these are much larger than Earth (since those are easier to discover), but several have been found that have a mass comoparable to Earth.
No - The volume of the Milky Way galaxy is larger than the volume of its host black hole. The accumulated mass of the Milky Way galaxy is greater than the mass of its host black hole. The density of the Milky Way galaxy is much smaller than the density of its host black hole.
The Milky Way Galaxy was made by the Big Bang, but it was discovered by a Greek Astronomer called Democritus. It was discovered with the naked eye because they didn't have much technology then.
The Milky Way Galaxy was made by the Big Bang, but it was discovered by a Greek Astronomer called Democritus. It was discovered with the naked eye because they didn't have much technology then.
There isn't much to "discover" - if you look up at night, you can see it with the naked eye.
It's not certain but one possibility is the super massive black hole at the centre of the Milky Way which is believed to contain as much mass as billions of Suns.
It's theoretically possible for a black hole to be larger than the Milky Way, but as far as we know, most are much, much smaller both in mass and extent.
Our galaxy, the milky way, has stars much bigger than our sun. Our sun is considered one solar mass in it's size. The Milky Way has star that range from 1/2 a solar mass to 50 or 100 solar masses.
There are roughly 400 billion stars in the Milky Way. The average mass of each of these stars is about half that of our sun, which is about 300,000 times as massive as Earth. Multiplying these numbers gives us the mass of the galaxy compared to the mass of the earth: 150,000 x 400,000,000,000 = 60 trillion. So the gravitational pull of the galaxy is roughly 60 trillion times that of the earth.
Most of the observation astronomers make are inside our Galaxy. Of course we still find new things. The Milky Way is a very complex and diverse collection of celestial objects. We still have much to learn!