An asteroid crept into the picture when Hubble took a picture of the Crab Nebula and its green and yellow patterns. To take a photo of an area of nebula size, Hubble must use a long exposure technique that can see other astronomical objects moving through the image. In this case, Hubble focused on the Cancer Nebula, located 6500 light-years from Earth, and saw an asteroid protruding through the sky.
With the Cancer Nebula being 10 light-years away, the asteroid can be seen traveling a staggering 94 607 304 725 800 kilometers.
The asteroid was first spotted by amateur astronomer Melina Tevenot of Germany, who volunteered for the European Space Agency's (ESA) Hunble Aster Hunter project
Earlier this year, ESA opened thousands of images to the public, lets them search galleries for hidden space rocks skipped by ESA.
The project is already paying dividends, with Ms Thévenot spotting the asteroid, leaving an astonishing streak of light through the Cancer Nebula, with the original image taken back in 2005.
ESA said: "Hubble Asteroid Hunter is a civilian science project for identification of a number of asteroid observations in the Hubble Space Telescope (HST). [1
"For example, identifying asteroids in images and marking the positions of their paths allows for valuable updates to the IAU Small Planet Center and improved object characteristics."
The Cancer Nebula is a supernova remnant that observed in 1054 AD, when Chinese astronomers notice a new point in the sky.
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And JWST has the ability to scan thousands of planets for extraterrestrial life – even though these planets are thousands of light-years away.
One of the major differences between Hubble and JWST will be how far back in time he can see.
Hubble can see far out in space and is essentially looking back in time as the light travels to the vessel.
Through Hubble, experts were able to see the formation of the first galaxies, about one billion years after the Big Bang.
However, since JWST is much more powerful, it will only be able to see 0.3 billion years after the Big Bang until the visible light itself begins to form.