The perceived national security threat posed by early Soviet leads in spaceflight drove NASA’s budget to its peak, both in real inflation-adjusted dollars and in a percentage of the total federal budget (4. 41% in 1966). But the U. S. […]
The Universe Galaxies how do we know how many galaxies there are in the universe Universe The Galaxies.
Further observational improvements led to the realization that the Sun is one of hundreds of billions of stars in the Milky Way, which is one of at least hundreds of billions of galaxies in the Universe. Many of the stars […]
Hubble Interacting Galaxies ngc 6090 wikipedia Galaxies Interacting Hubble.