Five Stellar Explosions in One Wide Sky Image
supernova remnant
Material left and spreading after a star explodes.
Auriga
A constellation containing the wide image’s five remnants.
Oukaïmeden Observatory
The Moroccan observatory where the image was observed.
What happened
NASA’s Astronomy Picture of the Day, or APOD, featured a remarkable wide-field image on September 24, 2026. It shows five supernova remnants across the constellation Auriga. A supernova remnant is the expanding material left after a star explodes. The image was made from about 200 hours of observations at Oukaïmeden Observatory in Morocco.
Why five remnants appear together
The five objects look close together in the picture. They are not parts of one explosion. Each came from a separate stellar explosion. They also sit at different distances from Earth, reaching out to several thousand light-years. Their apparent closeness comes from viewing a broad slice of the sky in one frame.
The image covers an enormous area. NASA compares it with the area of 1,000 full moons placed side by side. That comparison helps show why several faint structures can appear in one photograph. The field lies in Auriga, a constellation sometimes called the Charioteer.
What the colors reveal
As each explosion expanded, it created a growing shell of shocked gas. The shell also contains delicate, threadlike structures. In the image, hydrogen features appear in red. Oxygen features appear in blue. The colors therefore point to different materials inside the expanding remains. They are not simply decorative choices.
What the image identifies
From left to right, the five remnants are G181.1+9.5, G182.4+4.3, G179.0+2.6, G180.0−1.7, and G178.2−4.2. The fourth object is also known as Sh2-240, or the Spaghetti Nebula. The annotated version also marks the open star cluster M37 and the Tadpole Nebula.
Why it matters
The picture brings several separate histories into one view. The explosions happened independently, at different distances, and at different times. NASA estimates that some of these stellar explosions may be tens of thousands of years old. Early humans might have seen some of them as bright new stars. Those stars would have faded over weeks or months.
What remains uncertain
The APOD explanation gives broad estimates. It does not provide an exact distance and age for every remnant. It also does not establish which, if any, ancient observers saw a particular explosion. The next useful step for readers is to compare the annotated positions with the red hydrogen and blue oxygen structures. Future measurements could also refine the distance and age estimates.
Source: NASA’s APOD explanation
NASA Shows Five Star Explosions in One Picture
📰 Full story: Five Stellar Explosions in One Wide Sky Image
NASA, the U.S. space agency, featured a sky image with five old supernova remnants.
supernova remnant
Material left after a star explodes.
light-year
A way to describe very large distances in space.
Auriga
The constellation shown in the picture.
💡 The gist
- One wide picture shows five star explosions’ remains.
- The five remnants came from separate explosions.
- Red and blue colors show different gases.
The picture came from Oukaïmeden Observatory in Morocco. Scientists used about 200 hours of observations. The image covers a huge part of the sky. Its area equals about 1,000 full moons placed together.
The picture lies in Auriga. Auriga is a constellation. The five objects are supernova remnants. That means material left after stars exploded. The material keeps spreading outward. Each remnant forms a shell of shocked gas. Thin, threadlike shapes appear inside the shells.
Hydrogen appears red in the picture. Oxygen appears blue. These colors help readers compare the materials. They do not mean the objects are one connected cloud.
The five remnants only look close together. Each explosion happened separately. The remnants also lie at different distances. Some may be several thousand light-years away. NASA estimates that some explosions happened tens of thousands of years ago.
People long ago may have seen some explosions. They might have looked like bright new stars. The light could have faded over weeks or months. This is possible, not proven.
The image explanation gives broad estimates. It does not give exact ages for every remnant. It also does not say which ancient people saw which explosion. The annotated picture helps show each object’s location. Readers can also compare the red hydrogen and blue oxygen patterns.
Source: NASA’s image explanation
Five Old Star Explosions in One Picture
📰 Full story: Five Stellar Explosions in One Wide Sky Image
NASA, the U.S. space agency, shared a picture of the sky.
supernova remnant
A cloud left after a star explodes.
observatory
A place where people watch the sky.
Five leftovers from star explosions appear in the picture.
These are supernova remnants. They are clouds left after stars explode.
Each explosion happened separately. The objects only look close together.
The picture came from an observatory in Morocco. People watched the sky for many hours.
Red and blue colors show different gases. The gases spread through space.
The explosions happened very long ago. People may have seen them as bright stars. The stars may have faded after weeks or months.
Scientists know the remnants are far away. They still estimate some distances and ages. Read more in NASA’s picture explanation.