Hubble Space Telescope, 1995. Star-forming gas pillars in the Eagle Nebula. Iconic 20th-century astronomy photograph.
From Wikipedia
Pillars of Creation is a photograph taken by the Hubble Space Telescope that depicts elephant trunks of interstellar gas and dust in the Eagle Nebula of the Serpens constellation, some 6,500–7,000 light-years (2,000–2,100 pc) from Earth. These elephant trunks had been discovered by John Charles Duncan in 1920 on a plate made with the Mount Wilson Observatory 60-inch telescope. They are so named because the gas and dust are in the process of creating new stars, while also being eroded by the light from nearby stars that have recently formed.