Compares Galaxies (image) University of Copenhagen - Niels Bohr Institute Caption This graphic compares the size of the extremely compact dead galaxies in the early universe with the size of our own galaxy, the Milky Way. The two galaxy types have approximately equal amounts of stars, which means that the density of stars in the compact galaxies is more that 10 times higher than in the Milky way. The researchers have now discovered how these extreme galaxies formed. Credit Graphic courtesy of NASA, European Space Agency, and S. Toft og A. Feild Usage Restrictions Credit NASA, European Space Agency, and S. Toft og A. Feild Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.