Searching for new worlds using Vatican telescope | The Society of Jesus | CPT PPP Coverage
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Searching for new worlds using Vatican telescope | The Society of Jesus appeared on www.jesuits.global by jesuits.global.
The
motivation
To do this,
telescopes capture starlight and spectrographs break it down by wavelength into
a rainbow-like spectrum which is the star’s fingerprint of light. When
astronomers know these parameters precisely, they can use them to test their
theoretical models of stars. This often reveals that the models have some
shortcomings, or that observations of stellar spectra are still too imprecise.
But sometimes, it reveals that a star has a surprising story for astronomers.
That is what
motivated this team to carry out an ultraprecise survey of possible
planet-hosting stars.
“Because
stars and their planets form together, the question arose whether the existence
of certain chemical elements in a stellar atmosphere, or their isotopic or
abundance ratios, is indicative of a planetary system,” explains Prof. Klaus G.
Strassmeier, lead author, director at AIP and principal investigator of the
survey.
Astronomers
have hypothesized that the amounts of different chemical elements within a star
could hint that the star has terrestrial planets (rocky worlds like Earth or
Mars), could suggest ages for those planets, and could even provide clues that
the star has “eaten” some of its planets.
This needs to be further investigated and the
data now published form the basis for this. Of the over 5000 confirmed
exoplanets (planets orbiting other stars than the Sun), 75% were discovered
from space by observing the light of stars being reduced because of planets
passing in front of them.
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