Home > Blossary: The Moon
Name: Moon Age: 4.5 billion years old Mass: 73'490'000'000'000'000 million kg Shape: Egg-shaped Family: Member of our solar system, satellite of earth Active Relationships: Orbits around the earth Distance from earth: 384'467 km (~364 397 km at perigee, ~406 731 km at apogee) Traveling by car: 130 days Traveling by rocket: 13 hours Traveling by light speed: 1.52 sec Diameter: 3476 km (1/4 of the Earth's) Driving around by car: 4 days Gravity acceleration: 1.62m/sec2 (1/6 of Earth's) Revolution period: 27.3217 days Mean Synodic period(new moon to new moon): 29.530588861 days Mean orbital velocity: 1.023 km/sec

Category: Geography

8 Terms

Created by: tula.ndex

Number of Blossarys: 51

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Because of the loss of orbital energy to gravity from the Earth, the moon is very gradually moving away from the earth. In the very early history of the Earth, the moon looked about 3 times larger in apparent size in the sky, because it was closer to the earth.

Domain: Astronomy; Category: Moon

เนื่องจากการสูญเสียพลังงานของวงโคจรกับแรงโน้มถ่วงโลก ดวงจันทร์ได้มากค่อย ๆ เคลื่อนออกไปจากโลก ในประวัติศาสตร์ยุคแรกมากของโลก ดวงจันทร์มองประมาณ 3 ครั้งใหญ่กว่าขนาดปรากฏบนท้องฟ้า ก็ใกล้ชิดกับโลก

Domain: Astronomy; Category: Moon

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