Listen to a Podcast About Astronomy

Gaze at the cosmos — from planets and stars to galaxies, nebulae, and the large-scale structure of the universe. Understand the tools and techniques astronomers use to explore the night sky.

The Hubble Space Telescope, launched in April 1990, has fundamentally reshaped our understanding of the cosmos over more than three decades of operation, capturing iconic images like the Pillars of Creation in the Eagle Nebula and helping determine that the universe is expanding at an accelerating rate — a discovery that earned the 2011 Nobel Prize in Physics. As of 2024, astronomers have confirmed over 5,600 exoplanets orbiting other stars, with NASA's Kepler mission alone discovering more than 2,700 of them and revealing that planets are far more common than previously thought — statistically, there are more planets than stars in our galaxy. The James Webb Space Telescope (JWST), operational since mid-2022, has already detected galaxies from just 300 million years after the Big Bang, found carbon dioxide in an exoplanet atmosphere, and is challenging existing models of galaxy formation with its observations of unexpectedly massive early galaxies.

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