Ironing out Infinities with the Conformal Diagram
In today’s classic paper – Nobel laureate Roger Penrose fits the whole universe on a page!
UR #29: Measuring the White Dwarf Mass-Radius Relation using Thousands of Stars
Today’s undergraduate research post features a student who measures the white dwarf mass-radius relation using thousands of stars and a neat effect predicted by general relativity
The Alternative to Dark Matter May be General Relativity Itself
No dark matter, no modified gravitation, just general relativity. Let’s see what we can get in disk galaxies.
The first detection of the Schwarzschild precession in the orbit of the star S2
The GRAVITY team first detects the Schwarzschild precession of the orbit of the star S2 in the center of the Milky Way.
It Takes Two to Tango: Eclipsing White Dwarfs Push General Relativity to its Limit
The Zwicky Transient Factory (ZTF) observes the entire northern sky and collects data on as many stars as possible. Combing through the light curves of 20 million stars with periodic changes in brightness, the authors of today’s paper found a hidden gem called ZTF J1539+5027, an eclipsing white dwarf binary with an orbital period of only 6.91 minutes.
The First Image of a Black Hole
The Event Horizon Telescope has observed the supermassive black hole at the center of M87, producing the first-ever image of a black hole and marking the beginning of a new era in astronomy.