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Hubble revisits tangled NGC 6240

NGC 6240

Not all galaxies are neatly shaped, as this new NASA/ESA Hubble Space Telescope image of NGC 6240 clearly demonstrates. Hubble previously released an image of this galaxy back in 2008, but the knotted region, shown here in a pinky-red hue at the center of the galaxies, was only revealed in ...

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Maybe dark matter is not made up of heavy particles after all

An image comparing the data showing the many galaxies and the X-ray emission from the hot gas

Tom Broadhurst, the Ikerbasque researcher in the Department of Theoretical Physics of the UPV/EHU, together with Sandor Molnar of the National Taiwan University and visiting Ikerbasque researcher at the UPV/EHU in 2013, have conducted a simulation that explains the collision between two clusters of galaxies. Clusters of galaxies are the ...

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Superflare stars with large starspots observed

Imaginary drawings of a superflare star

A team of astronomers has used the High Dispersion Spectrograph on the Subaru Telescope to conduct spectroscopic observations of Sun-like “superflare” stars first observed and cataloged by the Kepler Space Telescope. The investigations focused on the detailed properties of these stars and confirmed that Sun-like stars with large starspots can ...

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Mercury’s magnetic field is almost four billion years old

The final image from the MESSENGER spacecraft sent April 30, 2015.

New data from MESSENGER, the spacecraft that orbited Mercury for four years before crashing into the planet a week ago, reveal that Mercury’s magnetic field is almost four billion years old. The discovery helps scientists piece together the history of Mercury, the closest planet to the sun and one about ...

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Cold Spot suggests largest structure in Universe: A supervoid 1.3 billion light years across

Cold Spot suggests largest structure in Universe: A supervoid 1.3 billion light years across

In 2004, astronomers examining a map of the radiation left over from the Big Bang (the cosmic microwave background, or CMB) discovered the Cold Spot, a larger-than-expected unusually cold area of the sky. The physics surrounding the Big Bang theory predicts warmer and cooler spots of various sizes in the ...

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