Posted on by Evan Gough

Measuring the Atmospheres of Other Worlds to See if There are Enough Nutrients for Life

A NASA graphic explaining how a telescope can measure an exoplanet atmosphere using spectroscopy. Courtesy: NASA/JPL-Caltech/Lizbeth B. De La Torre.
A NASA graphic explaining how a telescope can measure an exoplanet atmosphere using spectroscopy. Courtesy: NASA/JPL-Caltech/Lizbeth B. De La Torre.

Life on Earth depends on six critical elements: Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorous, and Sulfur. These elements are referred to as CHNOPS, and along with several trace micronutrients and liquid water, they’re what life needs.

Scientists are getting a handle on detecting exoplanets that might be warm enough to have liquid water on their surfaces, habitability’s most basic signal. But now, they’re looking to up their game by finding CHNOPS in exoplanet atmospheres.

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Posted on by Evan Gough

Water Worlds Could Have Plumes of Nutrients Carried up From Down Below

This reprocessed colour view of Jupiter’s moon Europa was made from images taken by NASA's Galileo spacecraft in the late 1990s. Credit: NASA/JPL-Caltech

Earth’s oceans are one huge, uniform electrolyte solution. They contain salt (sodium chloride) and other nutrients like magnesium, sulphate, and calcium. We can’t survive without electrolytes, and life on Earth might look very different without the oceans’ electrolyte content. It might even be non-existent.

On Earth, electrolytes are released into the oceans from rock by different processes like volcanism and hydrothermal activity.

Are these life-enabling nutrients available on water worlds?

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