But none are quite as ominous-looking as a huge space rock that's shaped like a skull and known as the 'Halloween Death Asteroid'.
Humanity will get a second chance to get a closer look at the space skull when it zooms by in November 2018.
The asteroid in the shape of the scary skull will fly by our planet exactly 36 months after the frightening space rock was discovered floating through space during the Halloween period. The experts think that the Halloween asteroid could, in fact, be a lost comet that lost its volatile compounds after orbiting the sun various times. The last time this asteroid approached the Earth was in 2015, and at that time, it was called the "Halloween Asteroid". This mysterious asteroid measures between 625 and 700 meters that crosses space, using the Pan-STARRS telescope. Researcher Pablo Santos-Sanz from the Institute of Astrophysics of Andalusia along with investigators from Europe prepared several equipments to watch the asteroid as it flew past the blue planet to know more about it. He issued his conclusions in the journal Astronomy & Astrophysics. However, the pathway followed by the asteroid this time is further than the previous encounter. Two years ago, IRTF programme scientist at NASA Headquarters said, "The IRTF data may indicate that the object might be a dead comet, but in the Arecibo images it appears to have donned a skull costume for its Halloween flyby".
As for its origins, it's thought that the asteroid might actually be an extremely old comet which has since run dry of its icy shell, leaving just a battered hunk of rock behind. As per the scientists, they are still studying about this weird asteroid, and maybe this time they will discover that this asteroid is whether cause any impacts or not.
According to Thomas G Muller, a researcher from the Max-Planck-Institute who was involved in studying the asteroid, the subsequent "exciting" visit from the Halloween asteroid will come 71 years from now.
After that, it will not come as close to Earth for many years to come, India Today reported, noting that the object will approach Earth at about 20 lunar distances in 2088. "The encounter on Halloween's day 2015 was the closest approach of an object of that size since 2006".
2015 TB145 is also expected to pay Earth a visit again in 2088, and at that time its distance from Earth would be roughly 20 lunar distances.