How astrophysics reads starlight for cosmic history

Astrophysics applies the methods and principles of physics and chemistry to study astronomical objects and phenomena, including the universe. How can reading starlight help uncover cosmic history, and what can you understand from it? The lessons connect the interpretation of light with the broader story of the cosmos.

3 articles, 1 video, 1 book · about 35 min of reading and viewing

The reading path

1. Read
   

   astrophysics · Wikipedia · 17 min read

   William Hyde Wollaston and Joseph von Fraunhofer independently discovered dark lines in the Sun's spectrum, as a new astronomy, soon to be called astrophysics, began to emerge. By 1860, Gustav Kirchhoff and chemist Robert Bunsen had demonstrated that these lines corresponded to bright lines in spectra of known gases, with specific lines corresponding to unique chemical elements. In astrophysics, radio astronomy studies radiation with a wavelength greater than a few millimeters. It examines radio waves usually emitted by cold objects such as interstellar gas and dust clouds, the cosmic microwave background radiation, and pulsars first detected at microwave frequencies. Astrophysics theorists create theoretical models and work out their observational consequences so observers can seek data that refute a model or help choose between alternate or conflicting models.

2. Read
   

   With AI, Astronomers Dig Up the Stars That Birthed the Milky Way | Quanta Magazine · Quanta Magazine · 5 min read

   Metal-poor stars have fewer heavy elements, meaning elements more massive than hydrogen or helium. More recent stars are metal-rich, so metal-poor stars must have originated in the proto-galaxy, a clue to the Milky Way's history.

3. Read
   

   These massive stars could explain Webb's strangest galaxies · ScienceDaily · 7 min read

   Ultraviolet light helps astrophysics study massive stars: their UV spectra reveal chemical elements in their atmospheres and details of the stellar winds carrying material away from their surfaces.

4. Watch
   

   Superfluid Dark Matter · YouTube · 6 min watch

   Superfluid dark matter may combine a normally fluid phase with a superfluid phase that looks like modified gravity. Sabine Hossenfelder argues that this combination best explains the existing data, including data on galaxy clusters, the cosmic microwave background and galactic rotation curves.

5. Book
   

   Contact · Bookshop.org

   Contact by Carl Sagan is a hard science fiction novel about contact between humanity and a more technologically advanced extraterrestrial life form.

Book links are Bookshop.org affiliate links. Curiate may earn a commission on purchases, at no extra cost to you — Bookshop.org also gives a share to independent bookshops.