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Hubble Space Telescope

Hubble to Use Moon as Mirror to See Venus Transit

This mottled landscape showing the impact crater Tycho is among the most violent-looking places on our Moon. Astronomers didn't aim NASA's Hubble Space Telescope to study Tycho, however. The image was taken in preparation to observe the transit of Venus across the Sun's face on June 5-6.

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Exposure Time Calculators

The ETCs are web-based applications that assist Hubble users in preparing Phase I and Phase II observing proposals. The ETCs calculate exposure times or SNRs for simulated astronomical observations using any of HST's primary instruments:

ACS | COS | STIS | WFC3

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HST Daily Report

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A synopsis of programs scheduled for observation with HST.

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Hubble Legacy Archive

The Hubble Legacy Archive (HLA) is designed to optimize science from HST by providing online, enhanced Hubble products and advanced browsing capabilities.