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Shown here in composite view, ALMA data (red/orange) reveals filament structures left behind by ram pressure stripping in a Hubble Space Telescope optical view of NGC4921. Scientists believe that these filaments are formed as magnetic fields in the galaxy prevent some matter from being stripped away.

Ram Pressure Stripped Galaxy NGC4921more_horiz

This side-by-side composite shows ALMA (red/orange) data laid over Hubble Space Telescope (optical) images of NGC4921. A new study of the spiral bar galaxy revealed filament structures similar to the Pillars of Creation but significantly larger. These structures are caused by a process known as ram pressure stripping, which pushes gas out of galaxies, leaving them without the material needed to form new stars.

Zooming in on Ram Pressure Stripping in Galaxy NGC4921more_horiz

Vimeo Thumbnail for Ram pressure stripping doesn’t spell immediate end for galaxy NGC4921

Ram pressure stripping doesn’t spell immediate end for galaxy NGC4921more_horiz

Radio/Optical composite image of the edge-on spiral galaxy NGC 4217. Magnetic field lines (green), revealed by the VLA, extend far above and below the plane of the galaxy.

Magnetic Field of a Spiral Galaxymore_horiz

The spiral galaxy M81 and its satellite, M82 as seen by the Very Large Array.

M81 in Radiomore_horiz

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04 – ALMA Top 10 – PHANGS: A New Survey Unravels the Relationship between Star-forming Clouds and their Host Galaxies.more_horiz

Physics at High Angular resolution in Nearby Galaxies survey studies Star-Forming clouds in disk galaxies

Star Formation Across the Universe Postermore_horiz

NGC 0628

NGC 628, PHANGS-ALMA and HST Compositemore_horiz

Galaxies in PHANGS-ALMA Survey

PHANGS-ALMA Survey Sample Galaxiesmore_horiz

NGC 4321

PHANGS-ALMA Radio Image of NGC 4321more_horiz

Galaxy from PHANGS-ALMA Survey

PHANGS-ALMAmore_horiz

M33

The Triangulum Galaxy in Radio and Opticalmore_horiz

NGC 660 and outburst

Outburst in NGC 660more_horiz

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Antennae Galaxies

Antennae Galaxiesmore_horiz

NGC 3596

Old, New, and Future Stars in NGC 3596more_horiz

Infographic depicting Smith's Cloud and Milky Way

Smith’s Cloud on Its Way to the Milky Waymore_horiz

UGC 3697

Warped Disk of Galaxy UGC 3697more_horiz

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