Astronomy

북쪽 하늘의 일주 운동 Diurnal Motion of North Sky

Diurnal Motion of North Sky (WebGL)

Pin the Earth * This is a web page using WebGL technology and do not work in Internet explorer. Diurnal Motion Fix the camera towards the Polaris at night. When you shoot…
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푸코의 진자 Foucault Pendulum

Foucault Pendulum (WebGL)

Earth fixed Latitude * This is a Web page using WebGL technology and do not work in Internet explorer. Foucault’s pendulum is a device invented by French scientist Leon Foucault to prove…
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지평 좌표계 Horizontal Coordinate System

Horizontal Coordinate System

Touch the screen to move the position of the star. How many numbers do we need to indicate the position of the star? After some time, is this star in the same…
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태양의 일주운동 Diurnal Motion of Sun

Diurnal Motion of Sun

Diurnal Motion is the changing view of the sky seen as the Earth rotates on its axis. What is the change in the movement of the sun during one year? What changes…
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달의 운동과 조석 Tides

Tides

Tides is the periodic rise and fall of the ocean surface due to the gravitational pulls of the moon and sun. Spring Tide is the highest high tide occurs during tide. Occurs…
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도플러 효과와 적색 편이 Doppler Effect and RedShift

Doppler Effect and RedShift

Most of the distant galaxies are moving away from our galaxy. Only a fraction of galaxies like Andromeda are coming to us. Scientists have found these things simply by observing the universe.…
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금성의 시운동 Apparent Motion of Venus

Apparent Motion of Venus

All planets in the Solar System revolve around the Sun in a counterclockwise direction when one views them from the north pole of the celestial sphere. Mercury and Venus are inner planets…
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금성의 위상 Phase of Venus

Phase of Venus

What is the difference between Geocentric theory and Copernican theory? What is the phase of Venus, which can not be found in the Geocentric theory?