In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small and in the Milky Way, while Curtis took a more radical position that they ...

Galaxies are the building blocks of the universe. Clusters of galaxies, and clusters of clusters of galaxies, called superclusters, make up the structures in the geography of the universe. In this ...

Here is a list of galaxies that are known in this universe other than your Milky Way galaxy. It is a spiral galaxy approximately 2.5 million light-years from Earth and the nearest major galaxy to the ...

galaxies had a redshift value of 0.059, meaning that it traveled approximately 825 million years on its journey to Earth. The image is a small part of the DESI Legacy Imaging Surveys — a ...

Messier was interested in comets, so his list was a set of fuzzy objects that ... Way – but astronomers now just call these systems galaxies. In 1920, astronomers Harlow Shapley and Heber ...

NASA’s newest space telescope rocketed into orbit Tuesday to map the entire sky like never before — a sweeping look at ...

In 2007, astronomers discovered the Cosmic Horseshoe, a gravitationally lensed system of galaxies about 5.5 billion light-years away. The foreground galaxy's mass magnifies and distorts the image ...