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A study of a group of astronomers, Marco Micheli of the European Space Agency (ESA), and published in the latest issue of the journal Nature, showed that the first interstellar object that was detected during the pbadage in the solar system was a comet. The conclusion was made after observations with the Hubble Space Telescope and the use of other instruments in the ground. The information comes from the column Sideral Messenger, the newspaper "Folha de S. Paulo".
The object, nicknamed "Oumuamua", was discovered in October 2017, while it had just been around the sun and was starting to come out of our system.
Although it was first considered a comet, the researchers had not identified any typical evidence for its behavior, such as gas and dust ejection.
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After another period of observation, the team discovered that 'Oumuamua' had an unusually long format. However, it is by studying the trajectory of the object that the greatest surprise has appeared. This is because it could not be totally attributed to gravity. The course, unlike the Sun, has been slightly modified by an extra force – something that is common to comets.
After these observations, it is very likely that the object is actually a comet, which has been expelled from another planetary system.
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