In almost every case, whether it is an instrument actually on the planet, or a telescope looking up from the earth, scientists use some variation of an instrument called a spectrometer. Spectrometers take a signal from whatever they are looking at (whether it is a rock, or a cloud or a whole planet or a star or a galaxy or a nebula, etc.) and spread the signal out into its components. Most spectrometers work with light and are a lot like extremely good prisms; they take the light coming from some object and separate it out into its colors. This is useful because it turns out that every element on the Periodic Table only gives off light of a few certain colors.
See related question(s) below.
BackboneHairYoung aliveNurse the young
botanist who proposed classifying plants using many characteristics
Characteristics used to classify a species include physical traits, genetic differences, behavior, habitat, and evolutionary history. Scientists often use a combination of these characteristics to determine how species are related and place them into taxonomic groups.
size, shape, and relationship to the surrounding rock layers
characteristics
Shape.
Triangles
Luster and composition are two characteristics used to classify minerals.
size and shape
size
you classify stars by color, temperature, size, composition, and brightness.
maritime and continental.
.All of the following are used to classify organisms into domains and kingdoms EXCEPT ____.Color of body
they use genus and dichotomous keys
There's an impossible way to classify all the shapes of 100 billion galaxies in the universe.
Astromoners and Astrologists.
temperature and mostiure