New Telescope Can 'Sniff Out' Life on Distant Planets

Topic: Space

Scientists from NASA's Jet Propulsion Laboratory have used a new instrument to detect biosignatures in the atmospheres of exoplanets. They found that water is the easiest molecule to detect, while oxygen is the most difficult.

A team of scientists from NASA's Jet Propulsion Laboratory has developed a new way to use the Extremely Large Telescope (ELT) to detect life on distant planets. The ELT is a massive telescope located in Chile and will be officially commissioned in the 2030s.

The scientists used a special instrument called the ArmazoNes high Dispersion Echelle Spectrograph (ANDES), which can capture light from exoplanets as they pass in front of their host stars. They chose 18 known, potentially habitable rocky planets to study and found that water is the easiest molecule for ANDES to detect.

In fact, it would only take between 10 and 19 transits (or passes) of the outermost planet to determine if water was present in its atmosphere. This is relatively short compared to the overall time it takes for a planet to orbit its star.

However, oxygen was found to be much harder to detect, requiring roughly four times as many transits as water. The scientists also made some optimistic assumptions in their study, such as ignoring clouds and hazes on exoplanets, which are actually very common.

While the results of this study are promising, they do highlight the challenges of detecting life on distant planets using ground-based telescopes like the ELT.

Why It Matters

This research is important because it could help us find signs of life on other planets in our galaxy. Who knows? Maybe one day we'll discover a planet that's home to intelligent life!

Key Facts

• The Extremely Large Telescope (ELT) will be officially commissioned in the 2030s.
• The ELT has a special instrument called the ArmazoNes high Dispersion Echelle Spectrograph (ANDES), which can detect biosignatures in exoplanet atmospheres.
• Water is the easiest molecule to detect using ANDES, while oxygen is the most difficult.
• It would take between 10 and 19 transits of a planet to determine if water was present in its atmosphere.
• The study assumed that there were no clouds or hazes on exoplanets, which is not realistic.

Key Terms

Spectrograph

A device that breaks down light into its different colors to analyze the composition of an object.

Biosignatures

Signs or signals in a planet's atmosphere that indicate the presence of life.

Implications

This research is important because it could help us find signs of life on other planets in our galaxy. Who knows? Maybe one day we'll discover a planet that's home to intelligent life!