NGC 1300 galaxy photographed by Hubble telescope – Photo: NASA and ESA
Galaxies are our islands in the ocean of the Universe
João Steiner clarifies how and why the Universe is distributed in these species of star islands called galaxies
By Luiza Caires
Galaxies like our Milky Way are like islands in the Universe, groups of stars (between gas, dust, and dark matter) that together shine so bright that we can see them millions and millions of light years away.
The earliest references to galaxies, by this name, came from Galileo in the 17th century, and in the 18th century Charles Messier compiled a catalog of what he identified as nebulae and galaxies. Much history has passed and debates have been waged between scientists until we come to the knowledge we have of galaxies today.
And in his column at USP Radio, astrophysicist John Steiner tells us some of these stories and the nature of these fascinating entities. Listen to “Understand Stars” in the audio above.
source: University of São Paulo – Brazil