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Peering into Our Universe

The James Webb Space Telescope is doing something astronomers dreamed about for decades: peering into our universe’s early past, a period known as cosmic dawn. In the latest episode of "NASA's Curious Universe," John Mather, a Nobel Prize winner in physics, talks about his role in the telescope's development.

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Ball Aerospace lead optical test engineer Dave Chaney inspects six primary mirror segments, critical elements of NASA's James Webb Space Telescope, prior to cryogenic testing in the X-ray & Cryogenic Facility at NASA's Marshall Space Flight Center in Huntsville, Ala. The James Webb Space Telescope will be launched in 2014 to study the formation of the first stars and galaxies and shed new light on the evolution of the universe.

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Colliding Galaxy Clusters

New observations from NASA’s Chandra X-ray Observatory and other telescopes have captured a rare cosmic event: two galaxy clusters have collided and are now poised to head back for another swipe at each other.

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Observations from Chandra and other telescopes have captured a powerful cosmic event: two galaxy clusters have collided and are now poised to head back for another swipe at each other. Galaxy clusters are some of the largest structures in the Universe held together by gravity. In these images, X-rays from Chandra and ESA’s XMM-Newton have been combined with LOFAR data and an optical image from Pan-STARRs of the stars and galaxies in the field of view.

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Hubble Captures Cotton Candy Clouds

This NASA/ESA Hubble Space Telescope image features a cloudscape in the Large Magellanic Cloud., a dwarf satellite galaxy of the Milky Way.

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Explore our changing planet

For more than 50 years, NASA satellites have provided data on Earth’s land, water, air, temperature, and climate. NASA’s Earth Information Center allows visitors to see how our planet is changing in six key areas: sea level rise and coastal impacts, health and air quality, wildfires, greenhouse gases, sustainable energy, and agriculture.

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An astronaut aboard the International Space Station captured this photograph of the Mississippi River while orbiting over Louisiana.

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