Astrophysics

How gravitational waves are detected, what produces them, and what they reveal about black holes, neutron stars, and the expanding Universe.

Learn how stars create the elements—from hydrogen fusion to supernovae and neutron star mergers. Explore s-, r-, and p-processes, evidence, and cosmic impacts.

Learn what neutron stars and pulsars are, how they form, emit signals, and test gravity, with insights from GW170817, NICER, magnetars, and pulsar timing.

How Cepheid variable stars reveal distances, calibrate Type Ia supernovae, and anchor the Hubble constant via the period–luminosity relation.

Discover what cosmic rays are, where they come from, how we detect them, and their impacts on technology, aviation, and climate—an in-depth astrophysics guide.

Discover how neutron star mergers produce kilonovae, gravitational waves, and heavy elements like gold. Physics, observations, and how to follow discoveries.

How stars create elements: proton–proton chain, CNO cycle, triple‑alpha, supernovae, and neutron star mergers. Evidence, processes, and open questions.

Learn the difference between dark matter and dark energy, the evidence behind each, how we measure them, and what missions are revealing about the dark Universe.

Discover what the CMB is, how it formed, how we map it, and what its tiny anisotropies reveal about the universe’s age, contents, geometry, and history.

Learn what dark matter is, why astronomers think it exists, the leading candidates, and how experiments worldwide are searching for it.

Learn how gravitational lensing bends light, reveals dark matter, measures H0, and powers JWST & Hubble discoveries. Strong, weak, microlensing explained.

Understand gravitational waves: how LIGO, Virgo, and pulsar timing arrays detect them, key sources, multi-messenger astronomy, and what comes next.