One reason JUUL and vape pens are so popular among teens currently might be that they can be used indoors without attracting unwanted attention or creating a stench, Morean says. On Twitter, teens post about their usage in school.
What is a star's emission spectrum? It is the same as the HR diagram and gives the same information. It is the fingerprint of all of the colors of light emitted by a star. It is a graph of all the pollution given off by a star. It is a graph of the starâs solar flares.
Stars, galaxies, black holes, pulsars, quasars and other objects strewn across deep space emit lots of energy elsewhere in the electromagnetic spectrum. Astronomers use radio, infrared, ultraviolet, X-ray and gamma-ray telescopes to look at those invisible emissions to gain a better understanding of the Universe.