Dwarf Planet Pluto

No, it would not be possible to go outside on Pluto without a spacesuit. Pluto's thin atmosphere consists mostly of nitrogen, methane, and carbon monoxide, which is not breathable for humans. Additionally, the extremely cold temperatures on Pluto, averaging around -375°F (-225°C), would be deadly without the protection of a spacesuit.

It wasn't "rejected", it was re-classified. Since Pluto's discovery in the 1930's, there have been many more discoveries of planet-like bodies in the trans-Neptunian region of the solar system. The one thing they all have in common is that they aren't very big. A new classification was identified: "Dwarf Planets". Pluto was reclassified to one of these, and there are a number of other ones.

Pluto's magnitude varies depending on its position in orbit, but is never brighter than 13.65.

The dimmest objects visible to the naked eye under perfect conditions are about magnitude 6.5 (the lower the number, the brighter the object). Pluto is about 1000 times dimmer than this.

The faintest objects visible with the aid of binoculars are about magnitude 9.5. Pluto is still over 50 times dimmer than this. A telescope would be necessary to see Pluto.

Pluto does have sunsets, but they would be quite different from Earth. Due to its distance from the Sun, the sunlight would be much dimmer and more scattered as it reaches Pluto, creating a unique and otherworldly sunset experience.

No it is the other way around. Pluto is colder than Mercury because Pluto is a lot further away from the Sun which is our Solar Systems main source of heat.

Pulto is a hypothetical planet sometimes referred to in science fiction or urban legends, but it is not officially recognized as a planet or dwarf planet by the scientific community.

The Voyager 2 space probe flew by Neptune in August 1989 and scanned the planet, sending photographs and scientific data back to Earth.

However, no, there has not been an astronaut landing on Neptune. And there wont ever be one for the following reasons:

- Neptune is freezing cold. A human would freeze to death in seconds

- Electronic equipment would also freeze and malfunction in the cold

- Neptune is a stormy planet. Humans would be blown off into space by the storm

- Neptune is a gas giant. Theoretically there is no solid surface for astronauts to walk on. They would sink through the planet and be consumed by the molten ammonia core.

- Modern space shuttles are only currently designed to orbit our own planet and the moon. We do not have the technology to keep a shuttle in space safely long enough with humans on board to reach Neptune.

one difference is just that the water is in a different form, I do not know the second one sorry i was trying to figure it out when i found this and decided to answer at the least part of thanks

-Sarah

Pluto doesn't orbit the sun. it cant because a bunch of other icy planets are in the way. Pluto belongs to a different belt which i forget it's name :) that's why Pluto isn't classified as a planted anymore (as of 2008)

Pluto is known for being the second object in history to have lost its status as a major planet. The first object to do this was Ceres.

Astronomers now believe that Pluto's effect on Neptune's orbit is negligible and has no significant impact. Despite initial speculation, further studies have shown that Pluto's mass is too small to have a measurable effect on Neptune's orbit.

Pluto is similar to the other planets because it orbits the Sun, has a spherical shape, and is located in our solar system. However, it is significantly smaller than the other planets and is classified as a dwarf planet.

The basic problem Pluto has and had from the outset is that it is smaller than 7 moons in the Solar System: Ganymede, Io, Europa and Callisto (the 4 Galilean moons of Jupiter) Titan (Saturn's largest moon) Triton (Neptune's largest moon) and our own Moon, all of which were discovered before Pluto.

There is understandable and widespread dismay at Pluto being demoted in status but people need to understand the reasons the IAU had to grapple with definitions and categories at this time:

(1) in 1930 we knew of just one body lying beyond the orbit of Neptune. Now we know of more than 1000

(2) we are discovering asteroids at a rate of 5000 a month

(3) we now know of 200+ extra-solar planets orbiting 170+ other stars, some of which we now know to have asteroid belts

It is conceivable the IAU may create more categories in the future in the light of more discoveries, The moment we find an extra-Solar System planet with extra-terrestrial life on it, for example, I would expect Habitable Zone Planet to be a new category and only Earth and Mars of our local 8 planets to be in it.

We already have the distinction between a terrestrial planet (the inner 4 planets) and a gas giant (the outer 4 planets) and are assessing new extra-Solar-System planets in the light of that distinction and a new category name for the informally-named "hot Jupiters" (i.e. large planets orbiting near to their star at less than 1 AU distance) of which we know several, may not be far away,

As science expands its knowledge, it needs more concepts and categories with which to describe and classify that knowledge, That is perfectly normal and should neither surprise nor alarm us,

Creating new categories and reclassifying known objects in the light of them has happened before: in the 19th Century when the number of planets was pruned from 11 to 7 out of concern that being consistent and admitting other, newly discovered bodies to the planetary club that were similar to the ones they chose to kick out instead would have meant the number of planets could rapidly start to escalate and mushroom out of control,

To understand what is going on now, it helps to understand what went on then,

The number of bodies in the Solar System known to astronomers has been burgeoning for a long time now, but the general public seems unaware of this, given the way people blithely talk of Ceres (discovered 1801) Charon (discovered 1978) and Xena (discovered 2003) having "just been discovered",

There was a similar definitions crisis in the early 19th century and again in the mid-19th Century as the number of known objects in the Solar System started to grow and grow,

By 1807 the 8 Solar System bodies known to classical astronomy (the Sun, the Earth, our Moon and the 5 classical planets known from antiquity, Mercury, Venus, Mars, Jupiter, and Saturn) (1 star, 6 planets, 1 moon) had grown to 26. Uranus was found in 1781 making 7 planets. There were 4 Jovian moons, 7 Saturnine moons and 2 Uranian moons, 14 in all

And then there was the discovery of the first four asteroids. These were 1 Ceres on January 1, 1801, 2 Pallas on March 28, 1802, 3 Juno on September 1, 1804, and 4 Vesta on March 29, 1807,

What were astronomers to call these new objects? They weren't moons as they rotated around the Sun, so they had to be planets, didn't they? As there was, initially, no other category but moons or planets to put them in.

After 2 Pallas was discovered though, Sir William Herschel (the discoverer of Uranus) coined the term "asteroid" meaning "star-like"), in 1802.

But Ceres was meantime assigned a planetary symbol, and remained listed as a planet in astronomy books and tables (along with 2 Pallas, 3 Juno and 4 Vesta) for about half a century until further asteroids were discovered.

So we now had 1 star, 11 planets and 14 Moons, the beginnings of a distinction between major and minor planets and a sense of unease as to what we would do if more asteroids were discovered as the first four were all disappointingly small in size, so did they really belong in the planetary club? (Similar doubts were expressed about Pluto, right from the outset in 1930,)

38 years pass and then in 1845 the asteroid 5 Astraea is discovered and on September 23, 1846 the planet Neptune and a mere 17 days later on October 10, 1846, Neptune's moon, Triton. (We now have 1 star, 12 Planets 15 Moons and 1 non-planetary Asteroid.)

The pace of discovery then starts to really hot up. Four more asteroids in nine months: 6 Hebe on July 1, 1847, 7 Iris on August 13, 1847, 8 Flora on October 18, 1847, and 9 Metis April 25, 1848

Then on September 16, 1848 an 8th moon of Saturn called Hyperion is discovered,

Plus a further 6 asteroids are found in just over two years: 10 Hygiea on April 12, 1849, 11 Parthenope on May 11, 1850, 12 Victoria on September 13, 1850, 13 Egeria on November 2, 1850, 14 Irene on May 19, 1851 and 15 Eunomia on July 29, 1851.

And on October 24, 1851 a 3rd and a 4th moon of Uranus: called Ariel and Umbriel were discovered.

So now we had 42 objects: 1 star 12 planets 18 moons and 11 asteroids. If the latest asteroids were all to be regarded as planets, making a total of 23 planets (and 10 Hygiea was bigger than 3 Juno, just like Xena is bigger than Pluto), it was likely to start getting silly (by 1868 the number of asteroids was to rise to 107 and Victorian schoolchildren would have needed a massive 115-word mnemonic to remember all the names).

The unease grew to a crisis, a redefinition was clearly necessary and an inevitable decision was taken to regard all 15 asteroids as a separate category from planets and Ceres, Pallas, Juno and Vesta were kicked out of the planetary club, just like Pluto has been kicked out now.

There are some clear parallels between the situation in the 1850s and the situation now, Four under-sized runts had obtained planetary status, with seemingly more to follow as they were discovered, creating an overwhelming feeling among astronomers that the currency would be devalued if all these further objects were to then be automatically awarded planetary status. So they cried Whoa! And called a halt. And created a new category, Just like the IAU has now done,

SO HOW MANY OBJECTS HAVE WE GOT IN THE SOLAR SYSTEM NOW?

Stars: 1

Planets: 8

Moons: over 80 known moons of the dwarf planets, asteroids and other small solar system bodies.

(The asteroid 87 Sylvia has 2 moons for example as does the Kuiper Belt Object KBO 2003 EL61.)

AND another 162 moons orbiting around planets: Mercury has none, Venus has none, Earth has 1, Mars has 2, Jupiter has 63, Saturn has 56, Uranus has 27, Neptune has 13.

Kuiper Belt Objects: over 800 (all discovered since 1992).

Trans-Neptunian Objects: over 1000 (includes the 800+ KBOs) i,e, there are 200+ in the Scattered Disk and the Oort Cloud.

Asteroids: Hundreds of thousands of asteroids have been discovered within the solar system and the present rate of discovery is about 5000 per month. As of July 23, 2006, from a total of 338,186 registered minor planets, 134,339 have orbits known well enough to be given permanent official numbers. Of these, 13,242 have official names.

Current estimates put the total number of asteroids above 1 km in diameter in the solar system to be between 1.1 and 1.9 million

So you can see

(a) why some definitions are needed and why reclassification is necessary

(b) how totally unaware of the state of scientific knowledge the general public is and how uninformed people are when they get excited at tales of "3 new planets being discovered" and wonder if there might perhaps be more where those came from,

Finally, these issues need to be seen in the context of the 205 extra-solar planets we now know to exist and the asteroid belts that have now been detected in some of those stellar systems,

Consistency being a desirable thing to achieve in science, whatever definitions and categories the IAU now adopt, they need to be applicable to every star with other objects in orbit around it, throughout the entire universe, That is the context in which Pluto's status is now being discussed.

The time it takes for a person to grow 20cm varies depending on factors like age, genetics, and nutrition. On average, children grow about 5-10cm per year during a growth spurt, so it could take 2-4 years. Adults may only grow a few centimeters in their lifetime due to the closure of growth plates.

pluto isn`t currently consider as a planet today because in 2006 scinctist decided that pluto is too tiny to be planet and it has a weird orbit and it also isn`t that round to be a planet.But I still want it to be planet but what can i do anyway

Pluto is now classified as a dwarf planet because it did not meet the criteria set by the International Astronomical Union for a full-fledged planet. In particular, Pluto did not clear its orbit of other debris. As a result, it was reclassified as a dwarf planet in 2006.

Yes, Pluto is extremely cold with surface temperatures averaging around -375°F (-225°C), which makes it inhospitable for life as we know it. Additionally, its thin atmosphere lacks the necessary components to support life.

Hydra is one of Pluto's moons, and its surface temperature is estimated to be around -230 degrees Celsius (-382 degrees Fahrenheit). This extreme cold is due to its distance from the sun and Pluto's overall frigid environment.

No known animals could survive on Pluto due to its harsh conditions, including extreme cold temperatures, lack of atmosphere, and minimal sunlight. Any living organism would require advanced technology and artificial support systems to survive in such an environment.

Pluto's distance from the Sun is from 4.4 to 7.4 billion kilometers. The speed of light is 300,000 km/sec. Light takes between from 4.1 hours and 6.8 hours to travel from the Sun to Pluto. For the mean distance of 5.9 billion km, it would take 5.46 hours.

It is correct to say "on the planet." This is because we live on the surface of the planet, not inside of it.

No, plants cannot photosynthesize on Pluto because there is no atmosphere to provide the necessary carbon dioxide and sunlight for photosynthesis. The extreme cold temperatures and lack of liquid water also make it impossible for plant life to exist on Pluto.

The length of Pluto's equator is approximately 4,493 miles (7,232 kilometers).

Since the 2006 reclassification of Pluto to a Dwarf Planet, there are now eight planets in our solar system.