Astronomers with the Event Horizon Telescope have developed a new way to observe the radio sky at multiple frequencies, and ...

There is no such thing as “black light wavelength”—so why do black T-shirts, black crayons, and black marking pens look black? Investigate a variety of black ink markers, and find out why they look ...

An international team of astronomers has successfully demonstrated a new technique to observe especially faint black holes by correcting for atmospheric effects on Earth. The technique, called ...

For example, infrared radiation appears black because it is invisible to humans. Our eyes detect the wavelength and power of the light, but our brains interpret it. So color perception always ...

M87’s supermassive black hole in polarized light ... And down on Earth, this high-frequency, low-wavelength light passes easily through the soft tissue of our bodies, but not our bones, yielding ...