Science

• The most accurate description of Earth's shape is Oblate spheroid.
• Earth is not a perfect sphere due to its rotation, resulting in a slight flattening at the poles and bulging at the equator.
• The Greek mathematician who calculated Earth's circumference using Sun angle observations is Eratosthenes.
• Earth's rotation causes a bulge at the equator.
• Anaxagoras supported the idea of a spherical Earth based on the observation the circular shadow Earth cast on the moon during a lunar eclipse.
• Anaxagoras argued that only a spherical Earth could produce a circular shadow on the moon.
• Aristotle supported a spherical Earth with the observation the variation in daylight hours at different locations.
• According to Aristotle, Earth casts a round shadow on the moon during a lunar eclipse.
• The mathematician credited with accurately calculating Earth's circumference is Eratosthenes.
• Eratosthenes measured the Earth's circumference by measuring the shadow of a stick in Alexandria and Syrene, along with knowledge of the distance between the two cities and geometry.
• Eratosthenes used measuring the shadow of a stick in Alexandria and Syrene, utilizing the distance between the two cities and applying geometric principles.
• Eratosthenes' approximate calculation for the Earth's circumference was 40,000 kilometers.
• The astronomer proposing the heliocentric model is Aristarchus.
• The comparative relationship is the Moon is closer to Earth than the Sun, and the Sun is smaller than both the Moon and Earth.
• From early astronomical observations, the conclusion is the Sun is many times farther than the Moon and much larger than Earth.
• The individual credited with measuring the length of the year accurately is Hipparchus.
• Predicting lunar eclipses contributes to enhanced accuracy in predicting celestial events.
• The primary cause of diurnal motion is earth's rotation on its axis.
• The primary cause of the annual motion of Earth is axial tilt.
• The approximate duration of Earth's complete revolution around the Sun is 365.25 days.
• The time taken for the moon to complete one full cycle of phases is 29.5 days.
• The alignment during a Full Moon is called solar eclipse.
• An eclipse is the blocking of light from one celestial body by another.
• The visible ring of the Sun's outer atmosphere is called corona.
• The term for the alignment during a lunar eclipse is syzygy.
• The Moon often appears red during a total lunar eclipse.
• The outer part of a shadow where only a portion of the light source is blocked is called penumbra.
• The celestial event with insufficient Moon size is annular solar eclipse.
• Solar eclipses occur, on average, every 18 months.
• The phenomenon where the edges of the Sun extend beyond the Moon is called diamond ring effect.
• It is safe to observe the Sun directly during totality because the Moon completely blocks the Sun's harmful rays during totality.
• For observing a total lunar eclipse, it is more appropriate to choose a location on the night side, as the Earth's shadow is cast on the Moon during a lunar eclipse.
• During a partial solar eclipse, people do not experience the same level of darkness as during a total solar eclipse because the Earth's atmosphere scatters sunlight, preventing total darkness.
• No, people on the entire daytime side of the Earth cannot observe a solar eclipse because solar eclipses can only be observed from specific locations.
• If the Moon is at its apogee, it would appear smaller, resulting in a shorter duration of totality.
• Lunar eclipses occur less frequently than solar eclipses because the Moon has a larger orbit around the Earth, leading to fewer opportunities for alignment.
• If a solar eclipse is visible from a specific location on Earth, the required phase of the Moon is during a New Moon, look towards the western horizon.
• For a solar eclipse, one of the key factors is the elliptical orbit of the Moon around the Earth.
• A distinctive feature of lunar eclipses is a lunar eclipse can only occur during a full moon.
• The propagation of light is explained by the light travels as electromagnetic waves of light, light.