Because galaxies include stars, clouds of hot gas, and free charged particles
sailing through magnetic fields, and each of those emits radiations.
A large band of stars, gas, and dust particles hele together by gravitational force is called galaxy. Galaxies are really complex in nature consisting of billinns of stars. Some galaxies emit a comparatively small amount of radio radiations compared to the total radiations emitted and r called nosmal galaxies. Some galaxies are found to emit millions of times more radio waves compared to normal galaxies. They are called radio galaxies.
Yes, the isotope 227Ac emit alpha and beta radiations; all the isotopes of actinium are radioactive and emit radiations.
A radioactive substance emit nuclear radiations.
Well, you can see them, right? - Galaxies contain millions or billions of stars; each of these stars emit light.
Becquerel in 1896 discovered that uranium emit radiations.
Radioisotopes can emit harmful radiations that can cause cancer.
Some watches may emit low levels of radiation from the small amount of radioactive material used in luminous dials or hands, such as tritium. This radiation is typically very low and considered safe for everyday use. However, newer watches with LED or electronic displays do not emit radiation.
Yes, galaxies emit light primarily from the stars within them. This light can range from visible light to other forms of electromagnetic radiation such as radio waves, infrared, ultraviolet, and X-rays. The light emitted by galaxies allows astronomers to study their composition, age, and distance from Earth.
Americium emit alpha particles and gamma radiations.
Not all isotopes are radioactive; the radioactive isotopes are unstable and emit radiations.
The radioactive isotope is disintegrated in time and emit radiations.
The radioactive isotope is disintegrated in time and emit radiations.