A new three-dimensional (3D) vector parabolic equation method (PEM) is proposed to study the propagation of electromagnetic waves in tunnels, which is particularly useful for modeling wave propagation ...

Scientists say the phenomenon could “hint at” new particles or interactions between known particles that haven’t been ...

Radio telescopes saw a strange burst of unknown energy in June 2024. Now we know it was from Relay 2, an early ...

Using the Very Large Array (VLA), astronomers have performed radio observations of a galaxy cluster Abell 2744, nicknamed ...

Astronomers in Australia picked up a strange radio signal in June 2024 — one near our planet and so powerful that, for a ...

In addition, we give an example of the calculation of radio wave propagation characteristics in a tunnel using the tunnel cross-section dimensions, dielectric constant of rock, reinforced concrete, ...

Join the conversation in our Facebook group. Pulsars—whirling stellar corpses that send beams of radio waves across the cosmos—are today’s astrophysical Swiss army knives.

Astronomers detect 10 billion-year-old radio waves from a distant galaxy cluster SpARCS1049, revealing a mini-halo that ...

A communications satellite out of commission since 1965 is chirping at the Earth in radio frequencies. What is happening? We ...

Source of the radio waves was tracked to a location that matches that of NASA’s defunct Relay 2 spacecraft, which launched in ...