Anonymous ID: 782623 May 11, 2018, 4:28 p.m. No.1377197   ๐Ÿ—„๏ธ.is ๐Ÿ”—kun

Sky Event

 

It would take 135 days or so for an asteroid from asteroid belt to reach earth.

 

The first spacecraft to make a journey through the asteroid belt was the Pioneer 10 spacecraft, which entered the region on July 16th, 1972 (a journey of 135 days). As part of its mission to Jupiter, the craft successfully navigated through the Belt and conducted a flyby of Jupiter (in December of 1973) before becoming the first spacecraft to achieve escape velocity from the Solar System.

Anonymous ID: 782623 May 11, 2018, 4:32 p.m. No.1377236   ๐Ÿ—„๏ธ.is ๐Ÿ”—kun   >>7277

Sky event

 

If an object came from outside the solar system it would take years to reach earth.

Voyager took:

Launched in 1977, it was confirmed to have left the heliosphere by the decreased rate of charged particle detection in about 2012โ€“2013. Thatโ€™s approx 36 years after its launch