Cosmos. Deep-space signals.

Distances are in lunar distances (LD = 384,400 km). PHA = Potentially Hazardous Asteroid (size + orbit threshold). Close approach does not imply impact risk.

Direct neutron-monitor (NMDB) feeds aren't browser-reachable, so we use NOAA GOES integral proton flux (≥10 MeV) as a near-Earth energetic-particle proxy. Quiet background ≈ 0.2 pfu; ≥1 pfu = elevated; ≥10 pfu = Solar Particle Event (SPE). Forbush decreases from CMEs briefly suppress galactic cosmic rays.

Transient alerts may be preliminary and can be revised or retracted. Sources include Fermi GBM, Swift BAT, and IceCube.

Gravitational waves are ripples in spacetime from extreme events such as merging black holes and neutron stars. Latest public superevent pulled live from GraceDB; events may be preliminary and can be revised or retracted.

The Exoplanet Archive maintains the canonical catalog of planets beyond our Solar System, from rocky super-Earths to puffy hot Jupiters.