Astronomers are stunned by a mysterious piece of space junk orbiting Earth in unusual ways.
It is believed that the stain, which is up to 370 miles from the Earth's surface, is an "empty" garbage bag object.
It is believed to be a remnant of a rocket launch – but experts can not figure out which spaceship they are from.
Empty garbage bag objects – also called ETBOs – are often in an unpredictable way in orbit given their size and shape.
They can stretch over a dozen feet, but tend to be incredibly light, with this object weighing less than 2 pounds.
Scientists say they are not sure what the object is, probably just a piece of lightweight material like metallic foil left over from a space mission.
But it sent Sky Watchers into a frenzy when discovered by the ATLAS Telescope of the Asteroid Terrestrial Impact System (ATLAS) in Haleakala, Hawaii. 1
Astronomers called the object A10bMLz and said it was "extremely light" but also about a dozen feet long.
In a Facebook post, the Northolt Branch Observatories said, "This indicates that it is a so-called 'empty garbage bag object'.
"A piece of lightweight material (probably metal foil) left over from a rocket launch. It is not yet clear when A10bMLz was launched.
Astronomers continued to be confused when they noticed that the object was moving in the opposite direction than it should.
A10bMLz was moving "backwards," said the scientists – rather than the "advancing" West-East
Northolt Branch Observatories added, "The orbit is highly elliptical with a perigee only 600 km above the Earth's surface and a 1.4 times apogee than the Moon.
This huge orbit – a first for an ETBO – makes it even harder to identify the origin of the object.
"At present, we have no idea The origin of this object," said Project Pluto, which produces planetarium software.
"This is mainly due to the fact that the previous trajectory is really uncertain.
"Like an empty garbage bag that blows down the street, it can zigzag and spike in an unpredictable manner."
Pressure from the Sun's radiation is sufficient to send the lightweight object in strange directions.  It can even burn within a few months in the Earth's atmosphere before scientists can find out where it came from, added Northolt Branch Observatory.