Normal Stars & Star Clusters

Trumpler 3 and NGC 2353
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Credit: X-ray: NASA/CXC/Penn State Univ/K. Getman; Optical/IR: PanSTARRS;
Image Processing: NASA/CXC/SAO/N. Wolk

These images of star clusters represent a new study from NASA’s Chandra X-ray Observatory that shows how young Sun-like stars are dimmer in X-rays than previously thought. As described in our latest press release, this result has implications for the prospects of life developing and surviving on planets in orbit around these stars.

Trumpler 3 and NGC 2353 are so-called open clusters that contains hundreds of young stars. These stars are tied to each other through gravity, having been formed from the same clouds of gas. Many of these stars have masses that are similar to our Sun, but are much younger. In these new composite images of Trumpler 3 and NGC 2353, X-rays from Chandra (purple) have been combined with an optical image from the PanSTARRS telescope in Hawaii (red, green, and blue). Another star clusters from the new Chandra study, NGC 2301 is shown in the same color schemes with the X-ray and optical data.

Spring Collection
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Credit: NASA/CXC/SAO

In the Northern Hemisphere this week, the calendar officially passes from winter into spring when the length of the day and the night become equal as the days become longer. Meanwhile, there are places in space where blooms of the stellar variety are always growing.

This collection of images from NASA’s Chandra X-ray Observatory and other telescopes contains regions where stars are forming. Often nicknamed “stellar nurseries,” they are cosmic gardens from which stars – not plants – emerge from the interstellar soil of gas and dust. X-rays are energetic enough that they can penetrate the gas and dust of these stellar nurseries, giving insight to the young stars and other high-energy phenomena that are happening within, including the effects of X-rays on any planets or planet-forming disks orbiting stars.

HD 61005
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Credit: X-ray: NASA/CXC/John Hopkins Univ./C.M. Lisse et al.; Infrared: NASA/ESA/STIS; Optical: NSF/NoirLab/CTIO/DECaPS2;
Image Processing: NASA/CXC/SAO/N. Wolk

This image contains the first astrosphere, or wind-blown bubble, that astronomers have captured surrounding a star that is a younger version of our Sun. This discovery was made using NASA’s Chandra X-ray Observatory and is described in our latest press release.

The astrosphere was found around a star called HD 61005, which is located only about 120 light-years from Earth. HD 61005 has roughly the same mass and temperature as the Sun but is much younger with an age of about 100 million years, compared to the Sun’s age of about 5 billion years. This commonality with the Sun is important because the Sun has a similar bubble, which scientists call the heliosphere. The discovery of the astrosphere around HD 61005 gives astronomers a chance to study a structure that may be similar to what the Sun was embedded in several billion years ago.

Cocoon Nebula
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Credit: X-ray: NASA/CXC/SAO; Infrared: NASA/JPL/Caltech(WISE); Optical: M. Adler, B. Wilson;
Image Processing: NASA/CXC/SAO/L. Frattare

To celebrate Valentine's Day, we are releasing a new image of the Cocoon Nebula (officially named IC 5146). This heart-shaped nebula is a region in the Milky Way galaxy where new stars are forming. X-ray data from NASA’s Chandra X-ray Observatory (red, green, and blue) reveal a cluster of new stars that are just poking through the stunning nebula. Young stars, like those in the Cocoon Nebula, are very active and give off large amounts of X-rays that Chandra can detect.

NGC 6278 and PGC 039620
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Credit: X-ray: NASA/CXC/SAO/F. Zou et al.; Optical: SDSS; Image Processing: NASA/CXC/SAO/N. Wolk

This two-panel graphic represents the results of a new study that suggests that smaller galaxies do not contain supermassive black holes nearly as often as larger galaxies do. The new study, as described in our latest press release, analyzed over 1,600 galaxies that have been observed with NASA’s Chandra X-ray Observatory over two decades. The findings imply that most smaller galaxies likely do not have supermassive black holes in their centers, which is in contrast with the common idea that nearly every galaxy has one of these giant black holes within their cores.

The two galaxies shown here, NGC 6278 and PGC 039620, are representative of the galaxies in the study. In optical and X-ray images (X-rays are purple), both galaxies are seen in optical light data from the Sloan Digital Sky Survey. The insets contain just the X-ray data from Chandra. NGC 6278 is roughly the same size as our home galaxy and has X-rays detected from its core. PGC 03620 on the other hand is a smaller galaxy — only a fraction of the size of the Milky Way — and does not show any evidence of an X-ray source.

Fall Image Collection
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Credit: NASA/CXC/SAO

Before fall gives way to winter in the northern hemisphere, NASA’s Chandra X-ray Observatory has several images that celebrate autumn and its many delights to share. In spirit of the season, this collection gathers Chandra data with those from its telescopic family including NASA’s James Webb, Hubble, and Spitzer Space Telescopes, plus others in space and on the ground.

TOI 1227 / TOI 1227 b
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Credit: X-ray: NASA/CXC/RIT/A. Varga et al.; Illustration: NASA/CXC/SAO/M. Weiss; Image Processing: NASA/CXC/SAO/N. Wolk

A star is unleashing a barrage of X-rays that is causing a closely-orbiting, young planet to wither away an astonishing rate, according to a new study using data from NASA’s Chandra X-ray Observatory and described in our latest press release. A team of researchers has determined that this planet will go from the size of Jupiter down to a small, barren world.