Image credit: NASA, ESA/Hubble and Dimitrios Gouliermis; cropped and color-enhanced by WLT Report.

At first glance, it looks as if someone tore a hole through the stars.

But the vast black cavity at the heart of this new Hubble image is not empty by accident. It is the scar left by some of the most violent stars in the neighborhood—and the place where another generation is now being born.

The scene is N44, a sprawling stellar nursery in the Large Magellanic Cloud, a satellite galaxy of our Milky Way about 160,000 light-years from Earth. Its central cavity is so enormous that astronomers call it a “superbubble.”

NASA says the bubble measures roughly 210 light-years by 140 light-years. Light itself would need more than two centuries to cross its longest dimension.

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The hollow center was excavated over time by the stars inside it. Fierce stellar winds blasted material outward.

Then some of the largest stars reached the ends of their short lives and exploded as supernovae, adding even more force to the expansion.

Those shocks swept gas and dust into the bright shell surrounding the void. The result is destruction on an almost incomprehensible scale—but that is only half the story.

The expanding material also compressed parts of the shell until they became dense enough to collapse. Inside those knots, new stars began to form.

In other words, the same stars that helped tear open the superbubble may also have created the conditions for their successors.

That cosmic cycle is what makes the image more than a pretty picture. It is a portrait of stellar death and stellar birth occupying the same frame.

The numbers behind the view are just as staggering.

According to NASA’s account of the Hubble survey, astronomers cataloged nearly half a million stars and foreground interlopers across N44. Among them were almost 30,000 pre-main-sequence stars—young objects that have not yet begun steadily fusing hydrogen in their cores.

That enormous census gives researchers a rare way to map where stars of different ages sit in relation to the bubble, its gas shell and one another. The pattern can help reveal whether the superbubble’s expansion really did trigger waves of new star formation around its rim.

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The project, Hubble observing program 14689, was led by astronomer Dimitrios Gouliermis. Researchers combined multiple Hubble pointings into a broad mosaic instead of studying only one bright knot of the region.

N44 is especially valuable because the Large Magellanic Cloud contains fewer heavy elements than our corner of the Milky Way. That makes it a useful nearby laboratory for studying how stars formed in the younger universe, before generations of supernovae enriched galaxies with heavier material.

The image also captures a smaller bubble known as N44F near the upper-right corner. Unlike the huge central cavity, NASA says N44F was sculpted primarily by the wind from a single hot, massive star.

One star can reshape an entire neighborhood. A cluster can reshape a region hundreds of light-years wide.

There is a strange tension in the photograph. The brightest stars look tiny and delicate, yet their winds and explosions have pushed around quantities of matter that dwarf anything in human experience.

The central darkness looks like absence. It is actually evidence.

It records what earlier stars did, where their energy went and how a turbulent cloud became a nursery for tens of thousands of stellar infants.

Hubble photographed far more than a hole in space. It caught one generation of stars making room for the next.

This is a Guest Post from our friends over at WLTReport. View the original article here.

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