The recent merger of two neutron stars produced both visible light and gravitational waves, and that lets us determine just how fast the universe is expanding.
Black Holes And Gravitons
The latest detection of gravitational waves shows the power of gravitational astronomy, and lets us study aspects of quantum gravity.
Death Spiral
Will Earth eventually spiral into the Sun due to gravitational waves?
Seeing Gravitational Waves With Atomic Clocks
Atomic clocks could be used to observe gravitational waves in a new way.
A More Perfect Union
The second detection of a black hole merger confirms the success of gravitational wave astronomy.
LIGO In Space
LISA Pathfinder has made its first successful test of gravitational wave astronomy.
The Challenge of Proving Black Holes
What if black holes don’t exist, but similar objects do? How would we tell the difference?
How Close Is Too Close?
What would happen if two black holes merged near our solar system? While the real answer is complex, we can do a back of the envelope calculation.
Why Does Gravity Wave, And Why Does It Matter?
What are gravitational waves, and why is their detection such a big deal?
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