A Reason for the Earth Moving Away from the Sun and the Possibility to Escape Being Engulfed by a Red Giant Sun
Issue:
Volume 5, Issue 3, May 2017
Pages:
25-27
Received:
14 July 2017
Accepted:
24 July 2017
Published:
15 August 2017
Abstract: Using the radar technology and the tracking technology of interplanetary spacecraft, scientists have calculated that the sun and Earth are gradually moving apart. But no one knows the reason why the Earth is moving away from the sun. So the author has analyzed various factors affecting Earth’s movement, and found that during the normal rotation of the Earth around the sun, the atmospheric pressure on the trailing hemisphere of the Earth is higher than the other hemisphere, effectively increasing its rotation speed, thus making the Earth gradually move away from the sun along a spiral line. Generally, any planet with thick atmosphere can move away from its parent star under the sunshine of its parent star. At the current speed of Earth’s moving away from the sun, the Earth can survive the sun's red giant phase.
Abstract: Using the radar technology and the tracking technology of interplanetary spacecraft, scientists have calculated that the sun and Earth are gradually moving apart. But no one knows the reason why the Earth is moving away from the sun. So the author has analyzed various factors affecting Earth’s movement, and found that during the normal rotation of ...
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The Vulcanoid Asteroids: Past, Present and Future
Martin Beech,
Lowell Peltier
Issue:
Volume 5, Issue 3, May 2017
Pages:
28-41
Received:
10 July 2017
Accepted:
25 July 2017
Published:
25 August 2017
Abstract: A review and discussion of both the historical and contemporaneous ideas pertaining to the putative population of Vulcanoid asteroids is presented. Current observations indicate that no objects larger than between 5 to 10 km in diameter reside in the orbital stability zone between 0.06 and 0.2 AU from the Sun, and that, at best, only a small population of Vulcanoid asteroids might exist at the present epoch. We review the physical processes (sublimation mass loss, evolution of the Sun’s luminosity, Poynting-Robertson drag, the Yarkovsky effect, the YORP effect, unipolar heating and collisions) that will control the lifetime against destruction of objects, either primordial or present-day, that chance to reside in the Vulcanoid region. It is argued that there are no overriding and/or absolute physical mechanisms that fully rule-out the present-day existence of a small Vulcanoid population, but we note that the gap between what the observations allow and what the theoretical models deem possible is closing rapidly.
Abstract: A review and discussion of both the historical and contemporaneous ideas pertaining to the putative population of Vulcanoid asteroids is presented. Current observations indicate that no objects larger than between 5 to 10 km in diameter reside in the orbital stability zone between 0.06 and 0.2 AU from the Sun, and that, at best, only a small popula...
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