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Dwarf Planet Pluto

A dwarf planet that was the 9th planet from the Sun in our solar system until 2006 when it was determined it did not satisfy the requirements of being a planet.

2,286 Questions

What object would help us see stars and planets in your solar system more clearly?

a telescope because if you never heard of the Hubble telescope that is like the international telescope.

How long are around the world yacht races?

around the world yacht races take an extremly long time 6 months to be exact

What reason does?

what reason does Dr. Tyson give for Pluto status as Americas favorite planet

How long would it take you to travel 1 million km?

The earth travels 584336856 miles in one year. divide 1.5 million by 584336856 and you get the fraction of a year it takes to go that far which is 0.002567012. Multiply that by 365.25 which is the number of days in a year and you get 0.937601307. So, not a full day. Multiply that by 24 and you get 22 hours 30 minutes 8.75 seconds.

So, your answer is:

22 hours, 30 minutes, 8.75 seconds

How big does Pluto need to be to be a planet again?

It's not, strictly speaking, a matter of size. The bigger problem is that Pluto's orbit crosses Neptune's, which means that Pluto has not "cleared its orbit" (part of the definition of "planet").

Strictly speaking, planets that have not "cleared their orbits" include Neptune (in addition to Pluto, there are a lot of Neptunian Trojan asteroids), Jupiter (the Trojans), and Earth (there's at least one body in one of Earth's Trojan points). However, in all these cases, the bodies in question are much, much smaller than the planet. Pluto's orbit crossing Neptune's means that it would have to be larger than Neptune to claim with a straight face that it had "cleared its orbit" (in practice, if Pluto were, say, half or even a quarter the size of Neptune, we'd probably create a new category called "co-planets" or something for them).

However, it's not. It's not even close. It's smaller than the Moon by a noticeable fraction.

It's hypothetically possible that the definition of "planet" may be changed in the future (it may even be likely, given that there are quite a few people that aren't entirely happy with the current definition). However, it's not likely that any such redefinition will elevate Pluto to "planet" status once again. It's only due to a mistake (or, better, "incomplete information") that it was ever considered a planet in the first place, and rigging the definition so that Pluto gets included would be perpetuating a historical error.

One way the definition might change is to incorporate an actual mathematical parameter (there have been a couple proposed, including the "planetary discriminant" mu and the Stern-Levison parameter lambda).

The "planetary discrimant" is determined by dividing the mass of the candidate body by the mass of all other bodies sharing its orbit. For the "real" planets in the Solar System, this is orders of magnitude greater than 100; for the dwarf planets and other objects, it's orders of magnitude less than 100 (to give an example: mu for Earth is about 1,700,000; mu for Pluto is around 0.08).

The Stern-Levison parameter is more complicated and depends on the mass of the object (squared) and, essentially, the length of its "year", but again there's a clear difference between planets (orders of magnitude more than 1) and dwarf planets and other "junk" (orders of magnitude less than 1). Using the same two bodies as before, Earth's lambda is about 150,000 while Pluto's is 0.0003.

Since the Stern-Levison parameter depends on the distance from the Sun (in a slightly complicated way), it's possible to determine the distance at which a body of that mass would have a lambda value of 1 (and therefore be a "planet"). For Pluto, that distance is about 80% of the Earth-Sun distance., while its actual distance from the Sun is about 50 times greater than that.

Stern himself is the head of the New Horizons project, and personally considers Pluto a planet, but even by his own parameters it doesn't qualify, and he's also proposed the term "uberplanet" to distinguish between bodies with lambda >= 1 and lambda < 1. "Uberplanet/planet" vs. "planet/dwarf planet" seems like a minor quibble, really.

Is Pluto water sold anywhere?

I know there is an uncapped spring at the French Lick Resort in French Lick, IN where you can still get the water.

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*"Pluto Water" was a commercially-marketed mineral water sold in the United States in the early 20th century. Its high concentration of mineral salts (likely including epsom salts/ magnesium sulfate) made it effective as a laxative (as opposed to other unsubstantiated health benefits).

This is essentially similar to the effects of magnesium citrate, available in most pharmacies. It acts as an osmotic laxative, meaning it draws fluids into the intestine to treat constipation.

Does Pluto the planet orbit around a star?

Pluto, which is a planetesimal, not a planet, orbits the star called Sol. Sol gives its name to our Sol-ar system, and is often called, "The Sun."

Why is Vermont not considered one of the original 13 states?

Because we're just too darn contrary and decided to declair ourselves our own country in 1777 at the Congress at Windsor. Remember... Vermont was New England's wilderness at the time, and people who weren't well adjusted or were considered criminals in other parts of New England (like Ethan Allen and his brothers!) were actively encouraged to go to Vermont and "settle" there. In other words... to get the heck out of civilization! No wonder it is from Vermont we get the first decisive and winning battle of the revolution (the capture of Fort Ticonderoga) and no wonder Vermont decided to go it alone in 1777... most of these people had been asked to leave the other colonies and were in no mood to be cooperative or nice to anybody! :-) Actually, it was because there were disputed boundaries. Same lands were granted in VT by both New York and New Hampshire causing much confusion as to where the actual boundaries were. For example, the Battle of Bennington was fought in what was then known as Vermont, but is now in New York after the boundaries were established. As a side bar, there was no "battle" at the capture of Ticonderoga ... the Green Mountain Boys simply walked into the fort in the wee-wee hours and caught the British literally, asleep.

What is Earth's relative length of year?

A year here on planet Earth is 365 and a quarter days long.

A "relative length of year" can only be given by comparison with some other object's year. Since we live on the Earth, we usually compare the years of other planets to that of Earth, rather than the other way around.

So the year of Mars is 1.88 Earth years and that of Venus is 0.615 Earth years.

The year of Earth is 1.000 Earth years.

How long does Pluto take for it to rotate on its own axis?

maybe... uhh better u search in the Google, im not really sure about this... i did'nt know the answer, try to ask your mom or dad, or ur friends.

Which planet has the weakest gravitational pull?

There are 3 possible answers to this question: Mercury, Mars, or Pluto. The simple definition of gravity is the force of attraction between two objects. Two factors determine gravitational pull: 1) the mass of the two objects and, 2) the distance between the two objects. Gravitational pull is proportional to the product of the masses of the two objects. For example, gravitational pull doubles if either of the two masses is doubled. On the other hand, gravity grows weaker if the two objects are moved farther apart. It is inversely proportional to the square of the distance between them, or if the distance is doubled between the two objects, gravity is only 1/4th as strong. So both mass and distance matter when determining gravitational pull. The big variable that the question doesn't address is how far away are you from the planet when you want to know it's "gravitational pull". Do you want to know the gravitational pull at some constant distance in space from each planet's center, or do you want to know the gravitational pull at each planet's surface. Because each planet has a different diameter, the distance from the planet's center varies from planet to planet. Since both mass and distance matter, here are the qualified answers: Pluto has, by far, the least mass of all the planets, but Pluto is now considered to be a "dwarf planet" and is no longer to be considered as a regular planet. If it were to be considered, it would have the least gravitational pull of all the planets at both it's surface and at some fixed distance in space from it's center. Mars has slightly more mass than than Mercury but also has a larger diameter. The math works out that Mars has the least gravity at it's surface. Even less than the surface gravity of Mercury because of Mars' larger diameter. Mercury has slightly less mass than Mars and a much smaller diameter. The math works out that at some constant distance in space, Mercury has the less gravitational pull than Mars because Mercury simply has less mass. Because Mercury's diameter is smaller, which puts you closer to its center, that makes its surface gravity slightly more than Mars'.

Is there any meaning of weight of earth?

Yes and no.

The earth has mass and therefore weight, and is inside a gravitational field (several actually) but to "pick it up" would mean pulling it away from the sun, as bizarre as that seems. Inertia would be harder to overcome than gravity I imagine. The mass of the earth is a far more useful and meaningful concept.

Which group of planets is known as the extraterrestrial planets?

I think you mean extrasolar planets. Technically, all planets except Earth are "extraterrestrial." At last report there were almost 900 of them, with more to follow. They aren't a "group" in the usual sense, just a category.

How often does Pluto revolve around the earth?

Pluto - takes 248 YEARS to orbit the sun once ! 248 years - is approximately 2.17 million hours.

What rocks orbit the sun?

Terrestrial planets and moons of both gaseous and terrestrial planets. Don't forget Dwarf planets and the asteroid belt.

What does the inside of a locker look like?

metal dependes what colour ur school has chosen and if u have accesories in it for example stickers

What is Plutos fourth moon called?

Pluto fourth moon is called Styx. It was discovered in 2012. The telescope used to discover Styx was also used to discover the moon Kerberos in 2011. The two moon are about 15 to 20 miles in diameter.

When was the planet Pluto said he was no longer a planet?

Pluto was reclassified as a dwarf planet on August 24, 2006, by the International Astronomical Union. This decision was made because Pluto did not meet all the criteria necessary to be considered a full-fledged planet.

What did Pluto represent?

First of all, it's represent, not repersent, like how you currently put it. Anyway, Pluto, in Roman mythology represented Hades, the god of death because Pluto is so far away from the sun. Pluto's moon, Charon, is named after the boatman that carries you to the realm of death for one gold or silver coin.

How many reasons why Pluto is not a planet?

There are several reasons why Pluto is considered a dwarf planet rather than a full-fledged planet. Some of these include its small size, its irregular orbit, and the fact that it shares its orbit with other objects in the Kuiper Belt. Additionally, Pluto has not cleared its orbit of other debris, which is a criterion for being classified as a planet.

Has Pluto completed a complete trip around the sun as a planet?

We don't know that for sure because it was only discovered in 1930, but it has a reasonably stable orbit of 248 years. It has probably been doing that for a billion years.

I think the answer is: No.

Pluto has not been classed as a planet since 2006. It was discovered in 1930.

So, it only orbited "as a planet" for about 76 years. That's a lot less than it's orbital period of 248 years.

It's a bit of a "trick question", but I think that's the required answer.