Extremely accurate measurements of the position of β Pictoris from the Hipparcos and Gaia satellites allow the direct measurement of the mass of the imaged planet β Pic b.
Astrophysicists and their experiments normally look up, not down. IceCube is an exception. Here the density profile of the Earth is measured using neutrinos.
Based on colour alone, can we distinguish between a rocky, icy and gaseous planet?
Spectrographs here on Earth are getting good enough to detect tortoise-speed velocity shifts in starlight. That means that we need to understand the bubbling, broiling surfaces of stars to tortoise-level precision.
Today’s paper explores different possibilities causing the brown dwarf CWW 89Ab to be overly bright.
In this bite we will explore nucleosynthesis in the merger of
neutron stars, by the light of gravitational waves and light itself.