Since the discovery of the "Pillars of Creation," what changes have occurred within them and the surrounding area?
Bobbie Hibbert
Ashton, Idaho
The Hubble Space Telescope’s iconic image of the Eagle Nebula’s “Pillars of Creation” heralded the instrument’s rebirth in 1995 and showed the public just how incredible astrophotography could be above Earth’s atmosphere. “No one imagined a reaction that would turn the image into a cultural icon,” Astronomy Contributing Editor Jeff Hester — who actually took the photo — said in Astronomy's commemorative Hubble issue in April 2015. The image has graced everything from U.S. postage stamps to classroom posters.
And yet the Pillars of Creation might not even exist anymore. NASA captured this stellar nursery at a fleeting moment. The region is packed with gas and young stars. And as those stars ignite, the gases evaporate into space, as seen in the green streaks that surround the columns. But because the nebula sits some 7,000 light-years from Earth, the light we see left the nebula 7,000 years ago, as agriculture spread across Europe. Intense ultraviolet radiation from young stars has stripped much of the gas since that time.
Even last decade, astronomers were seeing the signs of that destruction. Hubble revisited the Eagle Nebula in 2014, and this time took images in the near-infrared part of the light spectrum as well as the visible. And more recently, NASA's James Webb Space Telescope used its infrared eyesight to cut through the Pillars' dust and capture a new stunning view of the stellar nursery.
The 2014 Hubble view pierced the dust and revealed the pillars’ tenuous true nature, as well as infant stars hidden among the gas. One prominent jet, perhaps from another forming star, had already increased its reach some 60 billion miles (97 billion kilometers) farther into space. And scientists suspect that a nearby supernova, like the one thought to have brought our solar system radioactive elements, might have already ablated what was left of the gas. Spitzer Space Telescope images show the supernova’s shock wave was racing at the pillars 6,000 years ago.
We should know for sure what's left of the Pillars of Creation in a couple thousand years.
Eric Betz
Associate Editor
[Editor's note: This article was updated Oct. 19, 2022.]