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You can calculate the angular diameter of the Earth using the equation: $$a = \arctan \frac{D}{d}$$ where $a$ is the angular diameter, $D$ is the physical diameter of the Earth, and $d$ is the distance from the Moon to the Earth. The equatorial radius of the Earth is $r_E = 6378.1 \textrm{km}$, the diameter is therefore $D= 2 \times r_E = 12756.2$. The ...

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This can only happen if the moonrise at a certain date is earlier than the moonrise at the previous day. There are two reasons why this could happen: The body (Moon, Mars,...) moves in the opposite direction of the Sun viewed along the right ascension (or elliptical longitude) axis. The sidereal day is 4 minutes shorter than 24 hours which means that a ...

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The smoking guns: The ratio of oxygen isotopes of lunar rocks are almost identical to those of Earth. Lunar recession due to the tides which causes the Earth's rotation to slow down, means that just after the Earth formed, the Moon was very close to the Earth and the Earth was rotating very fast. This situation can be reached due to an oblique impact that ...

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The average angular diameter of the Moon, as seen from the Earth, is about 31 arcminutes. The angular diameter depends on the distance between the two objects and the diameter of the object being viewed. Specifically, for small angles, it is the diameter divided by the distance. When the distance is the same, the angular size is proportional to the ...

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The what if is superficial, it could never exist, but if one were to imagine, then; the out come would be very bleak for Earth and Mankind alike. Jupiter has the strongest gravitational pull in our solar system and most likely in our galaxy. It is one of our solar system's gas planets,or Jovian planets; it's core is made of H3, the gas succumbs to the ...

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