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What if the Moon Didn't Exist is a collection of speculative articles about different versions of Earth, published in book form in 1993. They were originally published in Astronomy magazine . Contents
Theia or Orpheus, [21] a Mars-sized impactor believed to have collided with the Earth roughly 4.5 billion years ago; an event which created the Moon. Evidence from 2019 suggests that it may have originated in the outer Solar System. [22] Vulcan, a hypothetical planet once believed to exist inside the orbit of Mercury. Initially proposed as the ...
The eternity of the world is the question of whether the world has a beginning in time or has existed for eternity.It was a concern for ancient philosophers as well as theologians and philosophers of the 13th century, and is also of interest to modern philosophers and scientists.
It takes Earth 365.242190 days — or 365 days five hours, 48 minutes and 56 seconds — to orbit the Sun, and the “extra time needs to be accounted for somehow,” the website says.
In philosophy, the problem of the creator of God is the controversy regarding the hypothetical cause responsible for the existence of God, on the assumption God exists.It contests the proposition that the universe cannot exist without a creator by asserting that the creator of the Universe must have the same restrictions.
Thus far, however, earth- and space-based telescopes and the NASA Parker Solar Probe have detected no such asteroids. While three Atira asteroids have perihelion points within the orbit of Mercury, their aphelia are outside Mercury's orbit. Therefore, they cannot be defined as Vulcanoids, which would require wholly intra-Mercurian circular ...
The phantom time hypothesis claims Charlemagne did not exist. The phantom time conspiracy theory is a pseudohistorical conspiracy theory first asserted by Heribert Illig in 1991.
This is an accepted version of this page This is the latest accepted revision, reviewed on 15 January 2025. Problem of the lack of evidence for alien life despite its apparent likelihood This article is about the absence of clear evidence of extraterrestrial life. For a type of estimation problem, see Fermi problem. Enrico Fermi (Los Alamos 1945) The Fermi paradox is the discrepancy between ...