All Discoveries
Browse 17 tracked cosmic objects including comets, asteroids, meteors, galaxies, and interstellar phenomena.
Apophis (99942)
Near-Earth asteroid, close approach 2029, collision risk assessed
Distance:0.28 AU
Magnitude:15.2
Discovery:Jun 2004
C/2020 F3 (NEOWISE)
Brightest comet visible to naked eye in 2020
Distance:0.29 AU
Magnitude:0
Discovery:Mar 2020
Ryugu
Target of Hayabusa2 mission, carbonaceous asteroid
Distance:1.0 AU
Magnitude:20
Discovery:May 1999
Bennu
Target of OSIRIS-REx mission, potentially hazardous
Distance:1.2 AU
Magnitude:20.5
Discovery:Sep 1999
67P/Churyumov-Gerasimenko
Target of Rosetta mission, famous for its unusual shape
Distance:1.8 AU
Magnitude:11.2
Discovery:Sep 1969
1I/Oumuamua
First confirmed interstellar object, cigar-shaped
Distance:100+ AU
Magnitude:24
Discovery:Oct 2017
SN 1987A
Brightest supernova since 1604, in Large Magellanic Cloud
Distance:168,000 light-years
Magnitude:2.8
Discovery:Feb 1987
Andromeda Galaxy (M31)
Nearest major galaxy, on collision course with Milky Way
Distance:2.5M light-years
Magnitude:3.4
Discovery:Ancient
Ceres
Dwarf planet, largest object in asteroid belt
Distance:2.8 AU
Magnitude:6.9
Discovery:Jan 1801
3I/ATLAS
Interstellar comet with water ice detection at 3 AU
Distance:2.95 AU
Magnitude:15.9
Discovery:Oct 2025
SN 2023ixf
Type II supernova in M101, brightest in 10 years
Distance:21M light-years
Magnitude:10.5
Discovery:May 2023
Whirlpool Galaxy (M51)
Interacting galaxy pair, classic spiral structure
Distance:23M light-years
Magnitude:8.4
Discovery:Oct 1773
Triangulum Galaxy (M33)
Third largest galaxy in Local Group
Distance:3.0M light-years
Magnitude:5.7
Discovery:Ancient
2I/Borisov
Second confirmed interstellar object, active comet
Distance:50+ AU
Magnitude:19
Discovery:Aug 2019
Perseid Meteor Shower
Peak: 50-100 meteors/hour, one of best annual showers
Distance:Earth orbit
Magnitude:0
Discovery:Annual (Aug 11-13)
Geminid Meteor Shower
Peak: 100-150 meteors/hour, brightest annual shower
Distance:Earth orbit
Magnitude:0
Discovery:Annual (Dec 13-14)
Leonid Meteor Shower
Peak: 10-20 meteors/hour, historically significant
Distance:Earth orbit
Magnitude:0
Discovery:Annual (Nov 17-18)