Sedna,+Eris,+Makemake

=**Sedna (Eri)**=
 * **Orbital Period:**
 * It takes 11,400 earth years to orbit around the sun, which is the longest orbit period of entire known large object in Solar System.
 * **Date of discovery:**
 * It was discovered on 14th November 2003 by Michael E. Brown, C. Trujillo, D. Rabinowitz.
 * Sedna was discovered by using Samuel Oschin telescope at Palomar Observatory near San Diego, California. Within a few days, it was also observed in Chile, Spain, Arizona and Hawaii’s telescope.
 * **Scientific history:**
 * Since there are nitrogen contain on the surface of Sedna, we could tell that there is a possibility that it might had an atmosphere around it self.
 * **Mythology:**
 * The name Sedna came from the Inuit goddess of the sea.
 * **Size:**
 * Dimension: 1,200–1,600 and mass of 1.8–4.3 x 1021 kg
 * Mass: 1.8–4.3 x 1021 kg
 * Mean density: 2.0? g/cm3
 * **Composition:**
 * Sedna's composition is still mystery.
 * At this time, we just know Sedna is in red color and there is no water and methane ice be found.
 * **Atomospheric conditions:**
 * Sedna does not have atmosphere around itself.
 * **Resources:**
 * Unknown
 * **What we don't know?**
 * The composition of Sedna and more.
 * **Future plans or expenditions:**
 * Since we just discovered Sedna few years ago, there are a lot of mystery about Sedna that we doesnt know about it. There are a lot of new things that astronomer could find out.

=**Eris**=
 * **Orbital Period:**
 * It takes 557 earth years to orbit around the sun.
 * **Date of discovery:**
 * It was discovered on 5th January 2005 by Michael E. Brown, C. Trujillo, D. Rabinowitz.
 * A group of astronomer discovers the dwarf planet, Eris on the picture which was taken on 21st October 2003 using Samuel Oschin telescope at Palomar Observatory near San Diego, California. It was publicize on 29th July 2005 together with another dwarf planet, Makemake.
 * **Scientific history:**
 * Eris used to have atmosphere before in the past but since it is really far away from the sun, it became a frozen solid.
 * **Mythology:**
 * The name of Eris came from the goddess of personification of strife and discord, Eris.
 * **Size:**
 * Surface area: 17,000,000 sq km and mass of (1.67 ± 0.02)×1022 kg
 * Mass: 1.66±0.02×1022 kg
 * Mean density: 2.52 ± 0.05 g/cm 3
 * **Composition:**
 * 50% are covered by pure methane ice and the rest part are made up with intimate mixture of methane, nitrogen and water ices, and ice tholin.
 * **Atomospheric conditions:**
 * Eris does not have atmosphere around itself.
 * **Resources:**
 * Unknown.
 * **Significant & Noteworthy features:**
 * Eris is the largest dwarf planet.
 * The mass is 27% greater than the planet, Pluto
 * **Future plans or expenditions:**
 * All three dwarf planet, Sedna, Eris and Makemake are all far away from Earth, we haven't find out much things about it.

=**Makemake**=
 * **Orbital Period:**
 * It takes 309.88 earth years to orbit around the sun.
 * **Date of discovery:**
 * It was discovered on 31th March 2005 by Michael E. Brown, C. Trujillo, D. Rabinowitz.
 * A group of astronomer lead by Michael E. Brown discovers the dwarf planet, Makemake by using Samuel Oschin telescope at Palomar Observatory near San Diego, California. It was publicize on 29th July 2005 together with another dwarf planet, Eris.
 * **Scientific history:**
 * **Mythology:**
 * The name Makemake came from the creator of humanity and god of fertility which was decided by the native people living in Easter Island.
 * **Size:**
 * Surface area: ~6,300,000 km2
 * Mass: ~3 × 1021 kg
 * Volume: ~1.5 × 109 km3
 * **Composition:**
 * The composition of Makemake is similar to Pluto.
 * It is made of 50-70% of rock and 30-50% of ice.
 * **Atomospheric conditions:**
 * Makemake has an atmosphere which made by merhane, erhane and nitrogen. This make itself appears really bright.
 * **Resources:**
 * Unknown.
 * **Significant & Noteworthy features:**
 * The size of itself is only about three quaters of Pluto.
 * The size of itself is only about three quaters of Pluto.


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