WHY A STUDY TARGETED PHOSPHINE IN SEARCH FOR LIFE BEYOND EARTH, Pg12.

Key Highlights:

• Astronomers detected trace amounts of phosphine on a brown dwarf dozens of light years away.
• The discovery helps refine the understanding of where phosphine can be found.
• Phosphine, a molecule produced by living things on Earth, is tricky to create and easy to destroy.
• The James Webb Space Telescope was used to observe Wolf 1130c, a brown dwarf.
• Phosphine was discovered on Wolf 1130C at a concentration of 100 parts per billion.

Detailed Insights:

• The presence of phosphine in the atmosphere of a brown dwarf can refine scientific understanding of how and where the molecule could be found, and eventually, help astronomers determine if phosphine is a reliable hint of life on rocky planets in the Milky Way.
• Phosphine is a molecule made of three hydrogen atoms and one phosphorus atom and is largely made by microbial life in swamp plants and animal intestines on Earth.
• A widely debated announcement of phosphine on the planet Venus in 2020 spurred interest in the molecule as a possible hint of life in other worlds, but phosphine is also found naturally in uninhabitable places like the giant gas planets Jupiter and Saturn.
• Wolf 1130c is an old brown dwarf missing heavier elements like oxygen from its atmosphere, making the discovery of phosphine there surprising.
• The molecule is destroyed when exposed to ultraviolet light, and won’t form in many environments, but the finicky nature of phosphine is exactly what makes it a promising candidate for being a sign of life.

Scientific/Technical Concepts Involved:

• Phosphine: A molecule made of three hydrogen atoms and one phosphorus atom, often associated with life.
• Brown Dwarf: An object between a planet and a star, lacking the mass to sustain nuclear fusion.
• James Webb Space Telescope: A space telescope used to measure wavelengths of light emitted and absorbed.