the.com/spectroscope
It reads the rainbow fingerprint of light and tells you what stars are made of.
means An instrument that splits light into its spectrum so you can study the bright and dark lines that reveal which elements produced it.
from A 19th-century scientific compound built from Latin 'spectrum' (an appearance or apparition, from 'specere,' to look) joined to Greek '-skopion' (a means of seeing, from 'skopein,' to watch or examine). So the name literally means 'a looker-at-appearances' — fitting for a device that stares into light itself. It rose to fame around the 1860s when Bunsen and Kirchhoff used spectral lines to identify elements, and astronomers soon realized the same trick could fingerprint the stars.
- discovery tool
- Helium was found in the sun before Earth
- how it works
- Splits light into telltale lines of color
- cosmic odometer
- Redshifted lines reveal galaxies fleeing outward
- named element
- Helium comes from helios, Greek for sun
- chemical lie detector
- Every element burns a unique spectral signature
fraunhofer lines — dark absorption lines in solar spectrum discovered by joseph von fraunhofer in 1814, mapped 574 lines
balmer series — visible hydrogen emission lines identified by johann balmer in 1885, key to understanding atomic structure