Universe

How do the densities of the inner planets compare to those of the outer planets? Why do they differ?

The inner planets are all made of heavy elements, so they are much denser then the outer planets; which are made of mostly gad and some liquids. The inner planets are made out of heavier elements because while the sun was forming asteroids and alrge space debris orbited the sun’s pre-fusion central mass close to the sun. The larger asteroids were then rounded by gravity and became planetoids in the inner solar system. Outser planets were originally large clumps of gas just like the sun was, but they orbited the suns central mass and were not alrge enough to engage fusion reactions. They all eventually rounded due to gravity, collected much of the loose gas in the early solar system (even taking many small asteroids as their moons) and continued orbiting the sun.

Gustav Holst – The Planets – Jupiter, the Bringer of Jollity

See my Gustav Holst Biography and Photo Gallery: http://www.innetproductions.com/gustavholst

Duration : 0:7:36

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The fact that all the planets orbit the sun in the same direction supportd the nebular hypothesis. Imagine that there is a diffrent hypothesis in which planets can be created orbiting the sun in either direction. Using this hypothesis what is the probility that all nine planets would end up traveling in the same direction?

But nevermind the fact that they orbit the sun in the same direction, why does one of them rotate on its axis the "wrong" way compared to the others. Stand on any planet in the solar system and the sun will always rise in the east and set in the west. Except on Venus. So even though its orbit is in the same direction, why is its rotation different?

***READ THIS BEFORE ASKING ANYTHING***

This is the ultimate size comparison video that you can find on the internet in HD.
Starts with the tinyest dwarf planets of our solar system, then continues with large planets, dwarf stars, stars giant/supergiant/hypergiant stars, nebulae, globular clusters and galaxies.
There is the famous VY Canis Majoris rated as the biggest star known, but very few know that that the incredible IC 1101 is the largest known object in the entire universe. Only galaxy clusters are bigger than it.
Hope you enjoy this one.

FAQ:
-Sizes are not 100% accurate as there is no way to directly measure them.
-Star sizes may change in the future, and new stars may eventually appear into this biggest stars list
-Song: Celtic Panpipes – Ride on

Duration : 0:4:0

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Jupiter, Pluto, and Saturn in my first house are retrograde. Uranus in 2nd, Neptune in 3rd, Mars in 12th are also all retrograde. All the retrograde planets in my chart fall in one hemisphere and the all forward moving planets are in the opposite. How do you interpret this?

You’re in the wrong section. This is Astronomy. Horoscopes is in the Entertainment & Music section.

All planets are observed to revolve in the same direction around the Sun. Additionally, most planets rotate in this same direction around their axis. How does the solar nebula theory explain this?

All the planets revolve around the Sun in the same direction because it is believed that this was the direction of rotation of the solar nebula – the cloud of gas and dust from which the Sun and all the planets were created some 4.5 billion years ago.

Dr. Robert Hurt explains why Pluto got… well… plutoed.

Duration : 0:3:31

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When I search it all of them have different planets and they seem a bit dated. Can anyone tell me where all the dwarf planets are, i know theres one between mercury and jupiter, and there’s pluto are there anymore?

There are 3 official dwarf planets at this time:
- Ceres
- Pluto
- Eris
There are also 11 candidate objects – the final decision has yet to be made by the IAU on their designation.

By the way, between Mercury and Jupiter are several planets (Venus, Earth, and Mars) plus the asteroid belt (which includes Ceres).

the popular digital simulation of the mars rover played with Holst’s “mars” from “the planets”
“uncanny” is all I have to say

Duration : 0:7:55

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A planets atmosphere consists of gases which are gravitationally bound to a planet. The nature of the atmosphere depends on the escape velocity of a planet. Would the terrestrial or the jovian planets be least likely to hold on to atmospheric gases? Explain.

I think that the jovian planets would be able to hold onto the atmospheric gases because the escape velocity is greater then the terrestrial planets. Also, don’t the jovian planets have denser atmospheres then the terrestrial ones?

You actually answered your own question wither you realized it or not the terrestrial planets are less likely to hold on to gases cause there smaller Jupiter has a core under all the gas’s that is much larger than earths that’s why gas cannot escape its gravity (not even helium) For example if you take a helium balloon to Jupiter it will sink here it floats up. if you take and Oxygen filled balloon here and drop it it sinks. On mercury it would float up the same as a helium balloon on earth.