The Disputed Center of the Universe
An ancient struggle to exalt the earth Einstein's Point of View
The struggle lost, Einstein pushes further The Moving Point of View
Where "now" depends on how fast you're moving Curving Space and Time
Warping slices of reality Geodesics
The straightest lines in curved space The Warped Point of View
Where "now" depends on how heavy you are

Compact objects

White Dwarfs
The Oldest and Coldest of Stars Neutron Stars and Pulsars
The Beacons of the Universe Black Holes
The Very End of Space and Time

Gravitational-wave astronomy

Gravitational Waves
Ripples in the fabric of spacetime

Sources of Gravitational Waves
Stirring up the ripples

Compact Binaries
Pairs of dead stars locked in a mad, whirling dance Extreme Mass-Ratio Inspirals
An Elegant Pas de Deux Collapsing Stars and Supernovae
The Death Throes of Stars Black Holes and Neutron Stars
Matter meets vacuum in a most dramatic fashion The First Moments
The birth of the universe: the most violent explosion ever Exotic Possibilities
Objects that physicists are just beginning to imagine The Unknown
Unimagined marvels await

A Totally New Kind of Astronomy
A different perspective on the universe A Totally New Kind of Observatory
Measuring the tiniest of fluctuations in spacetime Needles in the Haystack
Hearing the cosmic symphony

Numerical relativity

Einstein's Equations
Describing How Mass Warps Spacetime Why Numerical Relativity?
Calculating Physics Computer Simulations
Giving the Problem to a Computer Gravitational Waveform Models
From NR to data analysis Gravitational Lensing

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Our Motivation Members of the SXS collaboration Our Institutions Code of Conduct About This Site

For Researchers

Waveform Catalog Surrogate Waveforms Waveform Explorer SXS Papers SpEC: Spectral Einstein Code SpECTRE

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Four Areas of Science

Inspiration

Now, here, you see, it takes all the running you can do, to keep in the same place. If you want to get somewhere else, you must run twice as fast as that.

Through the Looking Glass

About SXS

The SXS project is a collaborative research effort involving multiple institutions. Our goal is the simulation of black holes and other extreme spacetimes to gain a better understanding of Relativity, and the physics of exotic objects in the distant cosmos.

The SXS project is supported by the Sherman Fairchild Foundation, Max Planck Society, NASA, the National Science Foundation, and XSEDE.

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