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Wednesday, February 1, 2023
Home This ground-based telescopic image of the Moon highlights the general region where astronomers used NASA’s Hubble Space Telescope to measure the amount of ozone in Earth’s atmosphere. This method serves as a proxy for how they will observe Earth-like planets around other stars in search of life. (M. Kornmesser (ESA/Hubble), NASA, and ESA) This ground-based telescopic image of the Moon highlights the general region where astronomers used NASA's Hubble Space Telescope to measure the amount of ozone in Earth's atmosphere. This method serves as a proxy for how they will observe Earth-like planets around other stars in search of life. (M. Kornmesser (ESA/Hubble), NASA, and ESA)

This ground-based telescopic image of the Moon highlights the general region where astronomers used NASA’s Hubble Space Telescope to measure the amount of ozone in Earth’s atmosphere. This method serves as a proxy for how they will observe Earth-like planets around other stars in search of life. (M. Kornmesser (ESA/Hubble), NASA, and ESA)

This ground-based telescopic image of the Moon highlights the general region where astronomers used NASA's Hubble Space Telescope to measure the amount of ozone in Earth's atmosphere. This method serves as a proxy for how they will observe Earth-like planets around other stars in search of life. (M. Kornmesser (ESA/Hubble), NASA, and ESA)

This ground-based telescopic image of the Moon highlights the general region where astronomers used NASA’s Hubble Space Telescope to measure the amount of ozone in Earth’s atmosphere. This method serves as a proxy for how they will observe Earth-like planets around other stars in search of life. (M. Kornmesser (ESA/Hubble), NASA, and ESA)

This diagram (not to scale) explains the geometry of the lunar eclipse. When the Moon is entirely in the Earth’s umbra (known as a total lunar eclipse or umbral eclipse), all sunlight reaching the lunar surface has been refracted or scattered through Earth’s atmosphere. When the Moon is in Earth’s penumbra (known as a penumbral eclipse), illumination comes from both direct sunlight and sunlight refracted and scattered through the planet’s atmosphere. (M. Kornmesser (ESA/Hubble), NASA, and ESA)