Makahanap ng mga solusyon at sagot sa lahat ng iyong katanungan sa IDNStudy.com. Hanapin ang mga solusyong kailangan mo nang mabilis at tiyak sa tulong ng aming mga bihasang miyembro.
Halley's Comet is arguably the most famous comet in history. As a "periodic" comet, it returns to Earth's vicinity about every 75 years, making it possible for a person to see it twice in their lifetime. It was last here in 1986, and it is projected to return in 2061.