Palomar survey
Galaxy data explorer
Browse the galaxy survey and emission-line measurements parsed directly from the supplied CSV files.
Galaxy survey
Radial velocity and galaxy activity
Each point is a galaxy. Negative heliocentric velocity indicates approach; positive velocity indicates recession. Larger circles have greater velocity dispersion, a proxy for the spread of stellar speeds.
Hover a point for details
Simulated positions for approaching and receding galaxies.
Relative positions of galaxies are arbitrary.
1 second = 1 billion years.
Physical displacement magnifier
Watch this panel during playback: each point shows its true radial displacement from the start. The horizontal axis is in light-years and uses a symmetric logarithmic scale so both approaching and receding motion remain readable.