Great Observatories Archives

July 27, 2024July 27, 2024 by Mark Thompson

Update your Desktop Wallpaper with 25 New Images from Chandra

This collection of images was released to commemorate the 25th anniversary of Chandra. Image credit: NASA / CXC / SAO.

It’s not always possible to observe the night sky from the surface of the Earth. The blocking effects of the atmosphere mean we sometimes need to put telescopes out into space. The Chandra X-Ray Observatory is one such telescopes and it has just completed its 25th year of observations. To celebrate, NASA have just released 25 never-before-seen images of various celestial objects in x-rays. The collection includes images showing the region around black holes, giant clouds of hot gas and extreme magnetic fields. Sadly though, NASA is planning on shutting down the mission to save budget so best to enjoy the images while you can.

April 25, 2020April 25, 2020 by Matt Williams

This is the Final Picture NASA’s Spitzer Space Telescope

This view shows the California Nebula imaged in visible light. The inset shows a section of the nebula imaged by NASA's recently retired Spitzer Space Telescope, which studied the universe in infrared light. Credit: NASA/JPL-Caltech/ Palomar Digitized Sky Survey

On Jan. 30th, 2020, NASA’s Spitzer Space Telescope was retired after sixteen years of faithful service. As one of the four NASA Great Observatories – alongside Hubble, Chandra, and Compton space telescopes – Spitzer was dedicated to studying the Universe in infrared light. In so doing, it provided new insights into our Universe and enabled the study of objects and phenomena that would otherwise be impossible.

For instance, Spitzer was the first telescope to see light from an exoplanet and made important discoveries about comets, stars, and distant galaxies. It is therefore fitting that mission scientists decided to spend the last five days before the telescope was to be decommissioned capturing breathtaking images of the California Nebula, which were stitched into a mosaic and recently released to the public.

May 3, 2019May 3, 2019 by Matt Williams

16 Years of Hubble Images Come Together in this one Picture Containing 265,000 Galaxies

This Hubble Space Telescope image represents the largest, most comprehensive "history book" of galaxies in the universe.The image, a combination of nearly 7,500 separate Hubble exposures, represents 16 years' worth of observations.The ambitious endeavor, called the Hubble Legacy Field, includes several Hubble deep-field surveys, including the eXtreme Deep Field (XDF), the deepest view of the universe. The wavelength range stretches from ultraviolet to near-infrared light, capturing all the features of galaxy assembly over time.The image mosaic presents a wide portrait of the distant universe and contains roughly 265,000 galaxies. They stretch back through 13.3 billion years of time to just 500 million years after the universe's birth in the big bang. The tiny, faint, most distant galaxies in the image are similar to the seedling villages from which today's great galaxy star-cities grew. The faintest and farthest galaxies are just one ten-billionth the brightness of what the human eye can see.The wider view contains 100 times as many galaxies as in the Hubble Ultra Deep Field, taken in 2004. The new portrait, a mosaic of multiple snapshots, covers almost the width of the full Moon. Lying in this region is the XDF, which penetrated deeper into space than this legacy field view. However, the XDF field covers less than one-tenth of the full Moon's diameter. Credits: NASA, ESA, G. Illingworth and D. Magee (University of California, Santa Cruz), K. Whitaker (University of Connecticut), R. Bouwens (Leiden University), P. Oesch (University of Geneva) and the Hubble Legacy Field team

Even after almost three decades of faithful service, the Hubble Space Telescope continues to operate and provide breathtaking images of the cosmos. As one of NASA’s Great Observatories, its observations of distant galaxies, exoplanets, and the expansion of the Universe have had a revolutionary impact on astronomy, astrophysics and cosmology.

Hubble’s latest contribution comes in the form of a deep-sky mosaic image that was constructed using 16 years’ worth of observations. Known as the “Hubble Legacy Field“, this mosaic is being described as the largest and most comprehensive “history book” of galaxies. All told, it contains roughly 265,000 galaxies that date back to just 500 million years after the Big Bang.

October 31, 2018 by Matt Williams

Yes! Hubble is Back in Operation

NASA's Hubble Space Telescope. Credits: NASA

Since it was first launched into space in 1990, the Hubble Space Telescope has become something of a household name. Over the course of its almost thirty years of service, Hubble has established a reputation as one of NASA’s Great Observatories, giving astronomers the ability to look farther into the cosmic field than ever before and learn new and fascinating things about our Universe.

It was therefore a bit of a scare then when NASA announced earlier this month that one of Hubble’s gyroscopes (gyros) had failed, causing it to go into safe mode. But on Oct. 26th, after a considerable effort on behalf of the operations team, NASA announced that the venerable Hubble had been restored to working order. As we speak, it is collecting science data and carrying on in the tradition it helped establish.

Continue reading “Yes! Hubble is Back in Operation”

April 3, 2013December 23, 2015 by Nancy Atkinson

NASA’s Great Observatories Provide a Sparkly New View of the Small Magellanic Cloud

A part of the Small Magellanic Cloud galaxy is dazzling in this new view from NASA's Great Observatories. The Small Magellanic Cloud, or SMC, is a small galaxy about 200,000 light-years way that orbits our own Milky Way spiral galaxy. Credit: NASA.

This is just pretty! NASA’s Great Observatories — the Hubble Space Telescope, the Chandra X-Ray Observatory and the Spitzer Infrared Telescope — have combined forces to create this new image of the Small Magellanic Cloud. The SMC is one of the Milky Way’s closest galactic neighbors. Even though it is a small, or so-called dwarf galaxy, the SMC is so bright that it is visible to the unaided eye from the Southern Hemisphere and near the equator.

What did it take to create this image? Let’s take a look at the images from each of the observatories:

The Small Magellenic Cloud in X-Ray from the Chandra X-Ray Observatory. Credit: NASA.

The Small Magellenic Cloud in infrared, from the Spitzer Infrared Telescope. Credit: NASA.

The Small Magellenic Cloud as seen in optical wavelengths from the Hubble Space Telescope. Credit: NASA.

The various colors represent wavelengths of light across a broad spectrum. X-rays from NASA’s Chandra X-ray Observatory are shown in purple; visible-light from NASA’s Hubble Space Telescope is colored red, green and blue; and infrared observations from NASA’s Spitzer Space Telescope are also represented in red.

The three telescopes highlight different aspects of this lively stellar community. Winds and radiation from massive stars located in the central, disco-ball-like cluster of stars, called NGC 602a, have swept away surrounding material, clearing an opening in the star-forming cloud.

Find out more at this page from Chandra, and this one from JPL.

November 10, 2009December 24, 2015 by Nancy Atkinson

Great Observatories Combine for Stunning Look at Milky Way

All we can say is, “Wow!” In celebration of the International Year of Astronomy 2009, NASA’s Great Observatories — the Hubble Space Telescope, the Spitzer Space Telescope, and the Chandra X-ray Observatory — have collaborated to produce an unprecedented image of the central region of our Milky Way galaxy. This is a never-before-seen view of the turbulent heart of our home galaxy. The image is being unveiled by NASA to commemorate the anniversary of when Galileo first turned his telescope to the heavens in 1609. NASA provided this image and the individual images taken by each of the Great Observatories to more than 150 planetariums, museums, nature centers, libraries, and schools across the country.

In this spectacular image, observations using infrared light and X-ray light see through the obscuring dust and reveal the intense activity near the galactic core. Note that the center of the galaxy is located within the bright white region to the right of and just below the middle of the image. The entire image width covers about one-half a degree, about the same angular width as the full moon.

For more about the image or to download larger versions, go to this page on the HubbleSite.