Is the planet that was discovered in 2003 a planet or just a big star?

Answer 1

On the whole, planets are much SMALLER than stars. Stars tend to stand out more than planets because they produce their own light (or other kinds of radiation). "New", dim or faraway stars are discovered all the time. Planets are harder to find. Several have been detected orbiting other stars. More small, dark, distant ones are being discovered in our own system, like Sedna, Eris, Quaoar, Varuna and some that haven't gotten more than a number so far (like 2003 EL61). There are very likely many more dark, distant and likely small planetoids circling our Sun but no stars. They would be obvious by their size and brightness.

Answer 2

You'll have to be more specific... Are you referring to Sedna? That was discovered that year. It's one of those "dwarf planets" out past the gas giants, which includes Pluto, Xena (or whatever it's called) and many others that will probably be discovered in the future. Those are definitely NOT stars.

Answer 3

Your statement "or just a big star" infers that you know nothing about the relative sizes of stars and planets.

The sun is an ordinary yellow star, but is 1000 times larger than all its planets put together.

The sun is 1.3 million times the size of Earth.

There are stars that are thousands of times more voluminous than the sun.

Answer 4

Stars are suns not planets. they have discovered afew dwarf planets outside pluto as well as planets around other stars/suns whitch is what I think you are refering to.

Answer 5

If you are talking about Eris (once unofficially called Xena but now officially named Eris), it is a dwarf planet.

Answer 6

It's poop. someone took a dump in space and now it is floating around.

Answer 7

neither they think its a balloon