NASA’s Hubble Space Telescope, while on a mission to track a supernova in a far-off galaxy, has inadvertently captured the trail of an asteroid. This unexpected observation has generated excitement in the scientific community due to its rarity.
The Hubble Space Telescope was trained on a galaxy located approximately 67 million light-years from Earth known as NGC 2525. The primary objective was to observe a Type Ia supernova, a stellar explosion that scientists use as “standard candles” to measure cosmic distances. This particular supernova, named SN2018gv, was first detected in mid-January 2018.
However, while monitoring the fading light of the supernova over the course of a year, the Hubble also captured the trail of a small, coincidentally passing asteroid. The asteroid trail appears as a tailed streak of light against the backdrop of distant stars and galaxies.
Asteroids are rocky remnants left over from the early formation of our solar system about 4.6 billion years ago and are primarily found in the asteroid belt—a region of space located between the orbits of Mars and Jupiter. The asteroid that Hubble spotted is located approximately 160 million miles from Earth in the asteroid belt.
The asteroid’s trail was captured in a series of Hubble exposures, where the telescope was pointed at the same location over 30 minutes. The asteroid appears to move across the field of view as a series of streaks because it was much closer to us than the distant supernova and the galaxy NGC 2525.
The Hubble Space Telescope has provided invaluable data and images since its launch in 1990, contributing significantly to our understanding of the universe. Its observations have led to breakthroughs in astrophysics, such as determining the rate of expansion of the universe.
This recent observation of an asteroid trail, while not part of the original mission, adds to the vast array of information provided by Hubble. The images captured by the telescope will aid scientists in their study of asteroids, which could potentially provide insights into the early solar system. Additionally, understanding the characteristics and trajectory of asteroids could have practical applications, particularly in the field of space safety and planetary defense.
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