We measure the extremely long distances between things in space by light years. A light year is the distance that light travels in one Earth year. Light travels at about 300,000 kilometres per second.

Adriano Anfuso/Vikas Chander The elliptical galaxy NGC 474 (lower right) contains multiple shell-like structures and tidal ...

This letter presents an innovative topology of evanescent mode filters with mixed electromagnetic coupling finalized to take full advantage of additive manufacturing techniques. A four-pole filter ...

Abstract: The scaled boundary finite element method (SBFEM) is a semi-analysis method, combing the advantages of boundary element method and finite element method. However, in solving the quadruple ...

Astronomers manning an asteroid warning system caught a glimpse of a large, bright object zipping through the solar system ...