Dust

Two merging galaxy groups put on a spectacular display for Chandra telescope

The groups are located about 380 million light-years from Earth and will form a cluster after the merger.

What is Australian Hay Fever that's in the news, and how is it treated? An explainer

Also known as allergic rhinitis, hay fever is an allergic reaction to pollen, fungal spores, dust, mites, animal dander or pollution

Astronomers detect a star forming in the outer regions of a disc of dust and gas

Main object, referred to as MM 1a, is a young massive star surrounded by a rotating disc of gas and dust.

Delhi's air quality likely to improve from Saturday as dust begins to settle down, says IMD official; Rajasthan to get no respite

Persistently suffering "severe" air quality for the third day in a row, Delhi's dusty situation is likely to improve from Saturday onwards, Met official said on Friday.