Planetary Science

Earth's diameter = 8000 miles X (3.14) = 25,120 mi. / 24 hr. = 1043 mph (spin)

Diameter of earths orbit = 186,000,000 mi. X (3.14) = 584,000,000 mi. /

8760 hr. = 66,666 mph (orbit)

{365 days / year X 24 hours / day = 8760 hours / year}

TOTAL SPEED = 1043 mph X 66666 mph = 6,953,638 (Figure 7M mph) plus times the rate of expansion of the universe {71 +/- 4 (km/s)/Mpc}

Lucky we are holding on!

What we think of as the "north star" Polaris will be visible in 13,000 years - but it won't be anywhere near north. As the Earth's rotation "precesses" or wobbles, the Earth's axis makes an enormous circle in the sky, and the very bright star Vega will be pretty close to the north pole.

Yes, different cultures see the same stars and constellations in the night sky. However, interpretations and mythologies associated with the stars may vary among cultures. The patterns of stars that form constellations are universal.

The average distance between Earth and the Moon is about 384,400 km. One light year is the distance light travels in one year, approximately 9.46 trillion km. So, the smallest distance is from Earth to the Moon.

No plants have been detected anywhere else but on the earth's surface.

Mercury and Venus can be seen as crescents when their positions in their respective

orbits are related to the earth's position in just the right way.

No, Mars does not orbit around the Earth. The moon orbits around around the Earth. Both Earth and Mars orbit around the sun, but Mars is farther away from the sun.

When it is farthest from the Sun. This point is known as aphelion.

*Aphelion = Furthest point from the Sun.

The star next to the moon is a star. Stars are self-luminous celestial bodies that emit light and energy due to nuclear fusion reactions occurring in their cores. Satellites are natural or artificial bodies orbiting a planet, while planets are celestial bodies that orbit a star and do not emit light of their own.

From earth, as of 27-Feb-2012, the moons position in the sky is close to Jupiters. The planet venus is also in the same vicinity, further to the right and down a bit. This answer will be invalid in a few days time though, so if your looking at this from the future, then please ignore it.

The Earth is typically divided into four cardinal directions: north, south, east, and west. These directions are determined based on the planet's axis tilt and rotation.

Galileo Gallilei (dont know how to spell his name) ,Johanes Kepler, and Newton

Galileo saw the solar flares cycles, Keples created Kepler's three laws of planetary motion which proved Tycho Brahe wrong. Kepler showed that each planet rotates around the sun in an elliptical shape (which have two vertices, one being the center of mass between the two objects and the second being the center of gravity)

Kepler was proved wrong because he did not have the theory of Universal gravity created by Newton 100 years later

Hope this helps

No. A meteor cannot hit the earth: meteors burn up in the earth's atmosphere. A meteorite, indeed slots of them, hit the earth last night. Astronomers estimate between 36 and 166 meteorites larger than 10grams fall to Earth per million square kilometres each year. Over the whole surface area of Earth, that translates to 18,000to 84,000meteorites bigger than 10grams per year. That is a minimum of at nearly 50 a day.

Write as an improper fraction.

93,000,000 / 250,000

Cancel down by 10,000

Hence

9300/ 25

Cancel down again by '25'

372/1

Hence the ratios is

93,000,000 : 250,000 :: 372:1

When the solar wind collides with Earth's magnetic field, it can cause geomagnetic storms and auroras to occur. The interaction can disrupt power grids, satellites, and communication systems. However, Earth's magnetic field acts as a shield, deflecting most of the solar wind and protecting the planet from its harmful effects.

Epsilon Eridani B is still unconfirmed, and details about it's size can only be speculative.

Based on it's mass being about 1.5 that of Jupiter, it's diameter will be about the same, as gas giants do not increase in diameter with masses <1.6 MJ. Above this value the planet will shrink.

So it's fair to say that Epsilon Eridani B will be the same size as Jupiter - give or take.

See related question.

Perihelion, the point in Earth's orbit where it is closest to the sun, typically occurs in early January each year.

1. Mercury - 5.43 gr/cm3
2. Venus - 5.24 gr/cm3
3. Earth - 5.515 gr/cm3
4. Mars - 3.940 gr/cm3
5. Jupiter - 1.33 gr/cm3
6. Saturn - 0.70 gr/cm3
7. Uranus - 1.30 gr/cm3
8. Neptune - 1.76 gr/cm3

Multiply the age of the earth in years, which is approximately 4.5 billion, by 365, and you get 1.64 trillion days.

The Sun is about 108 times greater than the Earth in diameter.

See related link for a visual picture.

The surface temperature of Hamal, also known as Alpha Arietis, is approximately 7,240 degrees Celsius (13,100 degrees Fahrenheit). It is a K-type giant star located in the constellation Aries.

Ganymede, the largest moon of Jupiter has the most mass of all the moons in the Solar System

Nebulae are massive collections of gas and dust that usually are very cool around 5-30 kelvin. These nebulae are the remains of dead stars that have long died and have had enough time to cool themselves from the original energy release of the nova or supernova that created them. As the nebula cools the particles begin to slow down and once cool enough gravity will begin to collapse the nebulae and form what is known as a protostar. This is the birth of stars, and is essential for star formation.

Planets and moons are both celestial bodies that orbit around a larger body, such as a star like the Sun. However, planets are typically larger in size, have more mass, and are able to support their own atmosphere, while moons are smaller and often lack an atmosphere of their own. Moons generally orbit around planets, while planets orbit around stars.