- published: 03 Feb 2014
- views: 955
90377 Sedna is a large minor planet in the outer reaches of the Solar System that was, as of 2015, at a distance of about 86 astronomical units (AU) from the Sun, about three times as far as Neptune. Spectroscopy has revealed that Sedna's surface composition is similar to that of some other trans-Neptunian objects, being largely a mixture of water, methane, and nitrogen ices with tholins. Its surface is one of the reddest among Solar System objects. It is most likely a dwarf planet.
For most of its orbit, it is even farther from the Sun than at present, with its aphelion estimated at 937 AU (31 times Neptune's distance), making it one of the most distant known objects in the Solar System other than long-period comets.
Sedna has an exceptionally long and elongated orbit, taking approximately 11,400 years to complete and a distant point of closest approach to the Sun at 76 AU. These facts have led to much speculation about its origin. The Minor Planet Center currently places Sedna in the scattered disc, a group of objects sent into highly elongated orbits by the gravitational influence of Neptune. However, this classification has been contested, because Sedna never comes close enough to Neptune to have been scattered by it, leading some astronomers to conclude that it is in fact the first known member of the inner Oort cloud. Others speculate that it might have been tugged into its current orbit by a passing star, perhaps one within the Sun's birth cluster (an open cluster), or even that it was captured from another star system. Another hypothesis suggests that its orbit may be evidence for a large planet beyond the orbit of Neptune.
The story tells of the king of the sky,
Creator of dreams
On a big book he used to write,
The destiny of all galaxies
Lost in darkness, in his castle, far in the universe
He knew when the world began,
why life ended up
And the reason why events took place
One flies away on the rainbow or inside life
And one's heart's alive...to run...
When the night falls, he'll dominate
And from his throne, magic he'll spread
Present and future have no difference
For the immortal ones
Prisoner of an impossible task
Of life be knew nothing at all
All that's real, the oceans and stars
Are a fruit of his mind
Every soul is important and dreaming he creates
New lives to lose or win
One flies away on the rainbow or inside life
And one's heart's alive...to run...
When the night falls, he'll dominate
And from his throne, magic he'll spread
A race, as an end, the face, that is aging
Where's the mystery behind the dream
The space, I need to open a door, to know if
Heaven will have my replies
One flies away on the rainbow or inside life
And one's heart's alive...to run...
When the night falls, he'll dominate