alleryStart learning →Which region is thought to be the source of long-period comets?
AOort cloud
BAsteroid belt
CVenus orbit
DEarth's moon
Answer & Solution
Correct answer: A. Oort cloud
Long-period comets are thought to come from the distant Oort cloud.
Keep practising Universe
Browse all Universe questions for Olympiad (Class 6), or explore more General Knowledge topics.
Related questions
Which large moon of Jupiter is bigger than the planet Mercury?What is a complete cycle of lunar phases called?In 1959, which spacecraft made the first flyby of the Moon?What are the large dark patches on the Moon, called maria, formed by?Why can the Moon cover the Sun fully during a total solar eclipse?A lunar eclipse happens when which event occurs?Compared with the planet Mercury, how big is the Moon?The Moon's mass is 1.2 percent of Earth's. If Earth's mass were 100 units, the Moon's woul