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Tribune News Network
Doha
The ‘Blue Planet’ earth will be at perihelion, the nearest point in its orbit around the sun, on Thursday, January 3, 2019, at 8am Doha local time when earth will be at 147 million kilometres approximately from the sun’s centre, Qatar Calendar House (QCH) has announced.
Astronomer at QCH Dr Beshir Marzouk said, “Earth -- and all planets -- moves in its orbit around the sun on ellipse (elliptical) orbit so that earth’s distance from the sun’s centre varies by approximately three percent when earth’s distance from the sun’s centre is 147 million kilometres when earth arrives at perihelion (nearest point). The distance becomes 152 million kilometres when earth arrives at aphelion (outermost point), while the average distance between earth and sun is called Astronomical Unite (AU), when one AU equals 149.7 million kilometres approximately.”
The earth reaches perihelion point (nearest point from sun) once every year during January, while it arrives at aphelion (outermost point) one time per year during July. Moreover, the earth was at perihelion last time on Wednesday, January 3, 2013, while it will be at perihelion next year on Sunday, January 5, 2020.
Dr Marzouk added that earth’s high or low temperature does not depend on earth’s distance from the sun as the earth is at the farthest point from sun during summer, while the earth is at nearest point from sun during winter.
He said summer is warmer than winter because of the titling of sun’s ray on the earth. During winter, the sun’s rays hit the earth at an extreme angle (sun’s ray is tilting on the northern hemisphere), and the days are very short, while during summer the sun’s rays hit the earth at a more direct angle (vertical) than during winter and also because the days are much longer than the nights during the summer on northern hemisphere.
Earth is the third planet from the sun and the only object in all universe known to harbour life. Moreover, earth revolves around the sun in 365.2422 days, and it is known as one year on the earth.
Doha
The ‘Blue Planet’ earth will be at perihelion, the nearest point in its orbit around the sun, on Thursday, January 3, 2019, at 8am Doha local time when earth will be at 147 million kilometres approximately from the sun’s centre, Qatar Calendar House (QCH) has announced.
Astronomer at QCH Dr Beshir Marzouk said, “Earth -- and all planets -- moves in its orbit around the sun on ellipse (elliptical) orbit so that earth’s distance from the sun’s centre varies by approximately three percent when earth’s distance from the sun’s centre is 147 million kilometres when earth arrives at perihelion (nearest point). The distance becomes 152 million kilometres when earth arrives at aphelion (outermost point), while the average distance between earth and sun is called Astronomical Unite (AU), when one AU equals 149.7 million kilometres approximately.”
The earth reaches perihelion point (nearest point from sun) once every year during January, while it arrives at aphelion (outermost point) one time per year during July. Moreover, the earth was at perihelion last time on Wednesday, January 3, 2013, while it will be at perihelion next year on Sunday, January 5, 2020.
Dr Marzouk added that earth’s high or low temperature does not depend on earth’s distance from the sun as the earth is at the farthest point from sun during summer, while the earth is at nearest point from sun during winter.
He said summer is warmer than winter because of the titling of sun’s ray on the earth. During winter, the sun’s rays hit the earth at an extreme angle (sun’s ray is tilting on the northern hemisphere), and the days are very short, while during summer the sun’s rays hit the earth at a more direct angle (vertical) than during winter and also because the days are much longer than the nights during the summer on northern hemisphere.
Earth is the third planet from the sun and the only object in all universe known to harbour life. Moreover, earth revolves around the sun in 365.2422 days, and it is known as one year on the earth.
