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Artist’s concept of spiral galaxy at the center of a much larger spherical halo of stars, with ground-based photograph pulled out to show details of the central core and spiral arms. View of the galaxy is halfway between face-on and edge-on, with disk oriented 45 degrees counter-clockwise from horizontal. Artist’s Concept: Galaxy core is whitish yellow, circled by a brownish purple disk. Grainy white halo enveloping the disk is dense and bright near the center, becoming more diffuse and fading out with distance from the main disk. Halo is mottled with a wispy cloud-like appearance, suggesting variations in density of stars. Halo covers an area of sky about 250 times greater than main disk. Photo: Telescope zoom into galaxy core and disk, outlined in yellow, shows brown dust lanes tracing spiral arms that wrap clockwise around fuzzy core; cloud-like patches of blue and red; star-like points of light of various size and brightness. Galaxy is 45 times larger in zoom than in illustration.

NASA’s Roman Space Telescope to Investigate Galactic Fossils

The universe is a dynamic, ever-changing place where galaxies are dancing, merging together, and shifting appearance. Unfortunately, because these changes ...
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An illustration of a star being torn apart by a black hole. To the right of center, there is a black sphere representing a black hole, surrounded by many thick wisps of light. To the left of it, there is a fuzzy, bright white object representing a star. The star has a tail of gas coming off its right, which is brightest near the star, but becomes grayer further away. This tail flows into the black hole’s right side and swirls around the black hole in a horizontal disk. The disk is thicker toward its center and more diffuse farther away. Material in the disk also appears to wrap around the top of the black hole. Above and below the black hole, there are purple rays of light that extend upward and downward in two broad cones. This scene sits amid a black backdrop of space with many dim, white stars in the background.

NASA’s Roman Space Telescope Could Help Researchers Detect the Universe’s First Stars

The first stars to form in the universe were very different from our Sun. Known to astronomers (somewhat paradoxically) as ...
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Illustration of the Roman Space Telescope

WFIRST Telescope Named For ‘Mother of Hubble’ Nancy Grace Roman

Today, NASA announced that it is naming its next-generation space telescope, the Wide Field Infrared Survey Telescope (WFIRST), in honor ...
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