NASA has confirmed that interstellar object 3I/ATLAS is a natural comet, not alien technology. The comet shows unusual carbon-dioxide and nickel vapours, offering a rare look at ancient material from another star. Its path is safe, staying about 1.8 AU from Earth during its Solar System passage.NASA has confirmed that interstellar object 3I/ATLAS is a natural comet, not alien technology. The comet shows unusual carbon-dioxide and nickel vapours, offering a rare look at ancient material from another star. Its path is safe, staying about 1.8 AU from Earth during its Solar System passage.