zoom_in Click to enlarge

Angelo Secchi

▲ ▼

description Angelo Secchi Overview

Angelo Secchi (1818–1878) was an Italian Jesuit priest, astronomer, and pioneer of astronomical spectroscopy who directed the observatory at the Roman College. He is best remembered for devising one of the first scientific systems for classifying stars based on their spectral emissions, categorizing them into four principal types. His foundational work in stellar classification heavily influenced later astrophysical models and our understanding of stellar evolution.

help Angelo Secchi FAQ

What was Angelo Secchi's star-classification system?

Secchi developed one of the first systems for grouping stars by their spectra during the 1860s and 1870s. His five Secchi classes helped lay groundwork for the later Harvard spectral classification system.

Where did Angelo Secchi work?

Secchi was a Jesuit priest who directed the observatory at the Roman College in Rome. He lived from 1818 to 1878 and conducted systematic observations of stars and the Sun.

What did Secchi study besides stellar spectra?

He photographed and analyzed the Sun's prominences, corona, and sunspots. His book Le Soleil, published in 1870, helped make solar spectroscopy an important part of nineteenth-century astronomy.

Is anything named after Angelo Secchi today?

NASA's SECCHI instrument package on the STEREO solar mission is named after him. The connection reflects Secchi's early work on solar observation and astrophysical spectroscopy.