Halley

Halley's Comet, named after British scientist Edmund Halley, is a short-period comet that appears every 76 years, with its next appearance in 2061. During its last approach to the Sun, space probes from the USA, Soviet Union, and Japan provided the first close-up observations of a comet.

What characteristic defines comets with short period orbits?

• They are visible only from the Southern Hemisphere.

• They appear every 100 years.

• They have a long tail.

• They orbit the Sun in less than 200 years.

Who is Halley's Comet named after?

• Isaac Newton

• Edmund Halley

• Albert Einstein

• Galileo Galilei

How often does Halley's Comet appear?

• Every 100 years

• Every 50 years

• Every 150 years

• Every 76 years

When is the next expected appearance of Halley's Comet?

• 2045

• 2050

• 2061

• 2075

Which countries sent space probes to study Halley's Comet during its last close approach?

• USA, Soviet Union, and Japan

• USA, China, and India

• UK, France, and Germany

• Australia, Canada, and Brazil