In 1521, the Portuguese navigator Magellan's voyage around the world proved that the earth was round 母 平录 (麦哲伦航船复制品) (麦哲伦环球航线图)
In 1521, the Portuguese navigator Magellan’s voyage around the world proved that the earth was round. (麦哲伦航船复制品） （麦哲伦环球航线图）
The Flat Earth Theory During the Middle Ages, clergymen denounced the spherical theory of the earth and a flat disc with jerusalem at the center was the only orthodox concept
• The Flat Earth Theory • During the Middle Ages, clergymen denounced the spherical theory of the earth and a flat disc with Jerusalem at the center was the only orthodox concept
The real shape of the earth Strictly speaking, the earth is not perfectly round. It is slightly flattened at the poles and has a bulge(an outward swelling )at the equator( an imaginary line around the earth exactly halfway between the poles In recent years, scientists have learned that there is another very small bulge at the North Pole. They say, therefore, that the earth is somewhat pear-shaped
• The Real Shape of the Earth • Strictly speaking, the earth is not perfectly round. It is slightly flattened at the poles and has a bulge (an outward swelling) at the equator ( an imaginary line around the earth exactly halfway between the poles). In recent years, scientists have learned that there is another very small bulge at the North Pole. They say, therefore, that the earth is somewhat pear-shaped
Eclipses In astronomy the word eclipse is used to describe two different things: an eclipse of the sun or an eclipse of the moon. An eclipse of the sun is called a solar eclipse. It occurs when the moon passes directly in front of the sun. As seen from various points on the earth, the moon blocks out the sun (Solar Eclipse Explanation) (Solar Eclipse Captured)
• Eclipses • In Astronomy the word “eclipse” is used to describe two different things: an eclipse of the sun or an eclipse of the moon. An eclipse of the sun is called a solar eclipse. It occurs when the moon passes directly in front of the sun. As seen from various points on the earth, the moon blocks out the sun. • (Solar Eclipse Explanation) (Solar Eclipse Captured)
Lunar Eclipse An eclipse of the moon is called a lunar eclipse. It occurs when the full moon passes behind the earth into the earths shadow within the shadow the moon is no longer directly lighted by the sun Moon p Sun Explanation Lunar Eclipses
• Lunar Eclipse • An eclipse of the moon is called a lunar eclipse. It occurs when the full moon passes behind the earth into the earth’s shadow. Within the shadow the moon is no longer directly lighted by the sun. • Explanation Lunar Eclipses