Mystery interstellar object could be oldest known comet | BBC News

Key Concepts:

• Interstellar Object: An object originating from outside our solar system.
• Comet: A celestial body of ice, dust, and gas that orbits a star and exhibits a coma and/or tail when near the star.
• Thick Disc: A region of the Milky Way galaxy containing older stars.
• Orbit: The curved path of a celestial object around a star, planet, or moon.
• Vera Rubin Telescope: A next-generation telescope in Chile designed for large-scale astronomical surveys.

Discovery of Interstellar Object 3 Atlas

• Astronomers spotted a mysterious interstellar object last week, marking only the third time such an object has been detected.
• The object, named 3 Atlas, was discovered as far away as the planet Jupiter.
• Scientists believe 3 Atlas is likely the oldest comet ever observed, estimated to be approximately 4 billion years older than any comet previously seen.

Age and Origin

• Researchers from Oxford University presented their findings at the Royal Astronomical Society meeting in Durham.
• The comet is estimated to be around 7 to 8 billion years old, potentially twice as old as the Earth and the Sun (which are about 4.5 billion years old).
• The team hypothesizes that 3 Atlas originated in the thick disc of the Milky Way, a region populated by ancient stars.

Orbit and Visibility

• The comet's orbit is depicted in red dotted lines.
• As 3 Atlas approaches the sun later this year, it may develop a visible tail of blazing dust that could be observed from Earth.

Significance and Future Discoveries

• Prior to 3 Atlas, only two interstellar objects had been observed.
• The upcoming Vera Rubin Telescope in Chile is expected to significantly increase the discovery rate of interstellar objects through its extensive celestial surveys.

Notable Quotes:

• Oxford University Researcher: "The discovery is really exciting... for the first time... we have new data to apply these predictions to and make comparisons and do some really interesting science with. So it's absolutely fantastic."
• Oxford University Researcher: "It could easily be twice as old as the planet we're stood on, the sun that's shining on me now, uh, and every single other comet that we've seen so far."

Synthesis/Conclusion:

The discovery of 3 Atlas represents a significant advancement in our understanding of interstellar objects and the early history of the Milky Way. Its extreme age and potential visibility from Earth offer unique opportunities for scientific study. The Vera Rubin Telescope promises to revolutionize the field by enabling the detection of many more such objects, potentially revealing new insights into the formation and evolution of galaxies.