OrbitSmith vs Meteorium

OrbitSmith is a free, open-source space situational awareness toolkit that puts the orbital environment at your fingertips. REAL-TIME 3D TRACKER Visualize 30,000+ objects orbiting Earth — active satellites, rocket bodies, and debris — rendered in real-time 3D with Blue Marble Earth textures. Tap any object to see its orbital details, search by name or NORAD ID, and track conjunction events from Space-Track CDM data. VISIBLE PASS PREDICTIONS Know exactly when to look up. OrbitSmith predicts visible passes of ISS, Tiangong, Starlink, and hundreds of bright satellites using SGP4 orbital propagation with real TLE data. Interactive sky charts with 44 reference stars help you find the satellite in the sky. NOTIFICATIONS & WIDGETS Never miss a bright pass. Receive push notifications before ISS and other satellites become visible, and check your next pass at a glance with lock screen and home screen widgets. MISSION DESIGNER Design satellite missions with a 5-step wizard. Choose from 7 mission templates, configure orbital parameters, run power/link/thermal/mass/orbit decay analysis, and find compatible launch vehicles from a database of 10 rockets. SATELLITE IMAGERY Browse 21 layers of satellite imagery from NASA, ESA, and ESRI — including MODIS true color, VIIRS night lights, sea surface temperature, vegetation health, and Sentinel-2 cloudless. All orbital data sourced from the U.S. Space Force via Space-Track.org.

Meteorium is an astronomy app that scientifically visualises the "dust trails" — the ribbons of comet dust that give rise to meteor showers. It shows 60,000 dust grains released by comet 109P/Swift-Tuttle, the parent of the Perseid meteor shower, over its eight perihelion returns from 1079 to 1992. Each grain is ejected from the comet's nucleus around perihelion and followed by full orbital integration including planetary gravity and solar radiation pressure, then rendered in 3D against NASA's all-sky star maps. The comet's position at the moment of ejection is anchored to the JPL Horizons ephemeris, which uses an orbit solution fitted to the observations of each historical apparition. Features: • 3D dust trails coloured by ejection year • Multiple viewpoints (ecliptic north/south, latitude sweep, Sun, ground, comet) plus a free view that tours the highlights every 10 s • Run time forward/backward at 10-10,000x to watch the trails evolve • Realistic Milky Way (NASA Deep Star Maps 2020), constellation lines and names, planets • Japanese / English Why do meteor showers return on the same dates every year? How does comet dust spread through the solar system? Meteorium shows you the three-dimensional structure and its evolution over time — and from the ground view you can simply enjoy the meteor shower itself. The app works fully offline, with no data collection and no ads. A Pro edition — theory computation for every shower, worldwide observation databases, ZHR outburst forecasts, dust-trail cross-sections, recording and image export — is in preparation.