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Hubble space telescope captures galaxy NGC 1961

In this newly released Hubble Space Telescope image, the galaxy NGC 1961 unfolds its gorgeous spiral arms. Glittering, blue regions of young stars dot the dusty spiral arms that wind around the galaxy's glowing core. NGC 1961 is an intermediate spiral galaxy with AGN (active...

Astronomers discovered distant galaxies and the true nature of dark matter

At the centre of spiral galaxies there is a vast spherical region made up of dark matter particles. This region has two defining characteristics. A density that is constant out to a certain radius. It amazingly expands over time and the density decreases. This...