Another method of measuring is carbon 14 with a half life cycle of 5730 years. Yet this is the most common method used. When the Hubble space telescope was launched, one of its first major jobs was to measure or find out how many red dwarfs there were in the universe. These measurement were made over a period of a year. The data was not released to the public because it did not fit what was assumed.
Scientists spend much time double checking the data and their figures.
The problem being that Hubble numbering data was way out of what was expected. In time a low level news conference was called, and Todd Lowe of the national Optical Astronomy Observatory in Arizona, released the data. Now when I say a young universe, I really mean a young universe. As I stated above, it was a low level news conference, so little of it reach the news papers. As this does not fit in with evolution theory, it is ignored, and they simply continue one or more theory's.