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Tag: Informations About Star (STAR PROFILE)

Informations About Star (STAR PROFILE)

Informations About Star (STAR PROFILE)

Diameter at Equator 864,938 miles

(109 time Earth’s)

Surface area 109109 sq miles

(12,000 times Earth)

Mass 2×1027 tons

(333,000 times Earth)

Volume 33 x 1016 cubic miles

(1.3 million times Earth)

Overall density 99 lbs. per square foot

Gravity (Earth = 1) 27.9

Number of main planets 9 (debated)




Known by most ancient people by its brief periods of visibility at

dawn and dusk, Mercury was named after the Roman winged

messenger of the gods. It has the fastest orbital speed of any planet,

averaging 30 miles every second. Being the closest planet to the Sun, it is

blasted by solar heat and other radiation. This has an extremely weak

atmosphere. Mercury’s daytime side heats to incredible temperatures, however,

the night side plunges to within -275°F.



Diameter at Equator 3032 miles

Surface area 75 million sq km

Tilt of axis 0.01º

Mass (Earth = 1) 0.055

Volume (Earth = 1) 0.056

Overall density 5.42 g per cm3

Gravity (Earth = 1) 0.377

Number of moons 0



Venus, the second planet from the Sun, is named after the Roman

goddess of love and is shrouded in mystery. It is covered by thick

swirling clouds of poisonous gases and droplets of acid that hide its

surface from the view of outsiders. Although Venus is about the same size

and mass as Earth, it could not be more different. It is the hottest of all the

planets, partly because its thick atmosphere traps in vast amounts of heat

from the nearby Sun in a greenhouse effect far more extreme than on Earth.



Diameter at Equator 7,520 miles

Surface area 460 million sq km

Tilt of axis 177.36º

Mass (Earth = 1) 0.815

Volume (Earth = 1) 0.856

Overall density 5.2 g per cm3

Gravity (Earth = 1) 0.90

Number of moons 0



Human beings may think of Earth as an “average” planet, but the

more we learn about the rest of the solar system, the more we see

that Earth is very unusual. This is mainly because its average

surface temperature is just above 71°F. Earth has the smallest range of

surface temperatures of any planet. Also, more than three-quarters of Earth’s

surface is rivers, lakes, seas, oceans, and frozen water as glaciers and icecaps.




Diameter at Equator 7,926 miles

Surface area 196.9 million sq miles

Tilt of axis 23.4º

Mass 6.6 sextillion tons

Volume 259.8 billion miles3

Overall density 5.517 g per cm3

Gravity 1g (9.8 miles per second2)

Number of moons 1



A moon, also called a satellite, is a natural object of reasonable size

going around a planet. The one human beings call the Moon is

Earth’s single moon. It has also been known to scientists as Luna.

The word luna comes from the Latin word for moon. Seen from Earth, the

Moon is about the same size as the Sun. It appears to change shape during its

29.5-day orbit because we can only see the sunlit part of its surface, creating

the phases of the Moon. Its pull of gravity also makes the water in seas and

oceans rise and fall, calle tides.




Diameter at Equator 2160 miles

Surface area 14.6 million sq miles

Tilt of axis 1.5º

Mass (Earth = 1) 0.074

Volume (Earth = 1) 0.020

Overall density 3.34 g per cm3

Gravity (Earth = 1) 0.165

Number of moons None





Named after the Roman god of war, Mars is also called the Red Planet,

because its surface rocks and dust contain large amounts of the

substance iron oxide, also known as rust. Like Earth, Mars has polar ice

caps, volcanoes, canyons, winds, and swirling dust storms. Features resembling

river beds and shorelines suggest that great rivers, probably of water, once flowed

across Mars’ surface. Despite many visits by space probes, landers, and rovers,

there are no signs of life.




Diameter at Equator 4228 miles

Surface area 55.9 million sq miles

Tilt of axis 25.1º

Mass (Earth = 1) 0.107

Volume (Earth = 1) 0.151

Overall density 3.9 g per cm3

Gravity (Earth = 1) 0.38

Number of moons 2





Jupiter is by far the biggest planet in the solar system. It is a vast planet

of swirling gases and storms of unimaginable fury. As the fifth planet

out, it is the nearest gas giant, a planet made almost completely of

gases, to the Sun. It is not much smaller than some of the stars called brown

dwarfs. Jupiter does not shine itself, but reflects sunlight as all planets do.

Even so, its huge pull of gravity holds more than 60 moons in orbit around it.

Jupiter is named after the Roman king of the gods, also called Jove.





Diameter at Equator 88,850 miles

Surface area 33.7 billion sq miles

Tilt of axis 3.13º

Mass (Earth = 1) 318

Volume (Earth = 1) 1,236

Overall density 1.33 g per cm3

Gravity (Earth = 1) 2.36

Number of moons more than 60





Known for its glistening, breathtakingly beautiful rings, Saturn is the

solar system’s second-largest planet after its neighbor, Jupiter. Saturn

was the Roman god of farming, civilization, prosperity, and also the

name of the rockets that powered the Apollo astronauts to the Moon. Due to its

fast spin, gas giant make-up, and very light weight compared to its size, Saturn

bulges around its equator as it rotates. This means the planet is 7,456 miles

wider than it is tall.




Diameter at Equator 74,897 miles

Surface area 16.48 billion sq miles

Tilt of axis 26.7º

Mass (Earth = 1) 95.2

Volume (Earth = 1) 688.9

Overall density 0.69 g per cm3

Gravity (Earth = 1) 0.91

Number of moons 50-plus





Uranus is the third gas giant and seventh planet from the Sun.

It is very similar in size and structure to Neptune, being partly gas,

but also containing much rocky and frozen material. The axis of

Uranus is almost at right angles to the Sun. Some scientists believe an Earthsized

object crashed into Uranus soon after it was created, giving it its

unique axis. The planet is named after the Greek god of the heavens, who

was also the father of Saturn.




Diameter at Equator 31,763.25 miles

Surface area 3.118 billion sq miles

Tilt of axis 97.8º (almost at a

right angle to the Sun)

Mass (Earth = 1) 14.54

Volume (Earth = 1) 63.1

Overall density 1.32 g per cm3

Gravity (Earth = 1) 0.89

Number of moons approaching

30 and counting





Neptune’s deep blue color of the fourth gas giant inspired its

name, the Roman god of the sea. Neptune’s atmosphere is ravaged

by the fastest winds in the solar system. Although it is the fourth

largest planet, it is third heaviest, being denser than its neighbor, Uranus.

Also like Uranus, Neptune’s atmosphere probably extends about one-fifth of

the way toward the center. Then, it gives way to a mix of semi-liquid ice,

rocks, methane, and ammonia, with a central core of maily partly molten

rocks and metals.




Diameter at Equator 30,775 miles

Surface area 2.94 billion sq miles

Tilt of axis 28.3º

Mass (Earth = 1) 17.15

Volume (Earth = 1) 57.7

Overall density 1.64 g per cm3

Gravity (Earth = 1) 1.14

Number of moons about 13






Pluto has held the honor of being the smallest and farthest planet in the

solar system, since its discovery in 1930. However, discoveries in

2003 and 2005 may threaten this record. A tiny, frozen, distant world,

Pluto is the least known of all planets. Our information comes from

telescopes only, since no space probe has visited it. Pluto also has a highly

unusual orbit, being very oval. For part of its immensely long year, Pluto is

actually nearer to the Sun than its neighbor, Neptune.




Diameter at Equator 1,412 miles

Surface area 6.9 million sq miles

Tilt of axis 122.5º to its

orbit, 115º to orbits of

other planets

Mass (Earth = 1) 0.002

Volume (Earth = 1) 0.007

Overall density 1.75 g per cm3

Gravity (Earth = 1) 0.06

Number of moons 1



Informations About Star (STAR PROFILE)