In March 2004 a new planet was__________ 10 billion kilometers from the Earth and was named Sedna. It was found by the

 In March 2004 a new planet was discovered 10 billion kilometers from the Earth and was named Sedna. It was found by the Hubble telescope. Some people say Sedna is not really a planet. Anyway, the news is  very exciting because the planet was found beyond the planetary Solar System. Space now has become larger! Such countries as Russia, the USA and Japan are planning to send more money on it. Do you think space exploration so important?