<P> 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 . </P>
<P> 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 . </P>
where is sedna located in the solar system
where is sedna located in the solar system
in the outer reaches of the Solar System at a distance of about 86 astronomical units ( AU ) from the Sun
in the outer reaches of the Solar System at a distance of about 86 astronomical units ( AU ) from the Sun