Understanding the Dynamic Universe
How astronomers watch the universe change — across every wavelength and messenger — and the transients, alert networks, and workflows that turn a flicker in the sky into science within hours. Built on real observations; nothing is fabricated.
Related entities
- Transient class
Type Ia Supernova
The thermonuclear detonation of a white dwarf that has been pushed over a critical mass. Their remarkably uniform peak brightness makes them the standard candles that measured the accelerating expansion of the universe.
- Transient class
Kilonova
The optical and infrared glow that follows the merger of two neutron stars, powered by the radioactive decay of the heavy elements forged in the merger. The 2017 event GW170817, seen in gravitational waves and light, was the landmark of multi-messenger astronomy.
- Transient class
Fast Radio Burst
Millisecond flashes of radio waves from far across the universe, immensely energetic for their brevity. At least some come from magnetars; most are one-off, though a few repeat. Their dispersion probes the matter between the galaxies.
- Alert system
Rubin Alert Stream
The torrent of alerts the Vera C. Rubin Observatory will issue — millions per night — as it scans the whole southern sky every few nights, feeding community brokers that filter the deluge into the events worth chasing.