How are comets and asteroids different?

How are comets and asteroids different?

Asteroids are made up of metals and rocky material, while comets are made up of ice, dust and rocky material. Both asteroids and comets were formed early in the history of the solar system about 4.5 billion years ago. Asteroids formed much closer to the Sun, where it was too warm for ices to remain solid.

How many miles is it from Earth to Neptune?

When Neptune and Earth line up on the same side of the sun, at their closest, they are only 2.7 billion miles (4.3 billon kilometers) apart. But when the planets are on opposite sides of the sun, they can put as many as 2.9 billion miles (4.7 billion km) between them.

Why is the ring of fire called the ring of fire?

The area encircling the Pacific Ocean is called the “Ring of Fire,” because its edges mark a circle of high volcanic and seismic activity (earthquakes). Most of the active volcanoes on Earth are located on this circumference.

Which animal has the fastest metabolism?

In fact, no animal has a faster metabolism—roughly 100 times that of an elephant. Hummingbirds burn food so fast they often eat 1-1/2 to 3 times their weight in nectar and insects per day.

How fast was the meteor that killed the dinosaurs?

Scientists calculate that it was blasted into Earth by a 10-kilometer-wide asteroid or comet traveling 30 kilometers per second — 150 times faster than a jet airliner. Scientists have concluded that the impact that created this crater occurred 65 million years ago.

Where did Beowulf come from?

In the poem, Beowulf, a hero of the Geats in Scandinavia, comes to the aid of Hroðgar, the king of the Danes, whose mead hall (in Heorot) has been under attack by a monster known as Grendel. After Beowulf slays him, Grendel’s mother attacks the hall and is then also defeated.

How did Camp David get its name?

In 1942, it was converted to a presidential retreat by Franklin D. Roosevelt and renamed “Shangri-La” (for the fictional Himalayan paradise). Camp David received its present name from Dwight D. Eisenhower, in honor of his father and grandson, both named David.

How many horses have won the Triple Crown?

13 horses have won the Triple Crown in horse racing (the Kentucky Derby, Preakness Stakes, and the Belmont Stakes). Sir Barton (1919), Gallant Fox (1930), Omaha (1935), War Admiral (1937), Whirlaway (1941) Count Fleet (1943), Assault (1946), Citation (1948), Secretariat (1973), Seattle Slew (1977), Affirmed (1978), American Pharoah (2015), Justify (2018).