SOLAR SYSTEM

The Sun and planets of the Solar System (distances not to scale)
Age	4.568 billion years
Location	Local Interstellar Cloud, Local Bubble, Orion–Cygnus Arm, Milky Way
System mass	1.0014 Solar masses
Nearest star	Proxima Centauri  (4.22 ly) Alpha Centauri (4.37 ly)
Nearest knownplanetary system	Proxima Centauri system  (4.25 ly)
Planetary system
Semi-major axis of outer known planet (Neptune)	30.10 AU  (4.503 billion km)
Distance to Kuiper cliff	50 AU
Populations
Stars	1  (Sun)
Known planets	8 (Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune)
Known dwarf planets	Possibly several hundred;[1] five currently recognized by the IAU (Ceres Pluto Haumea Makemake Eris)
Known natural satellites	472 (175 planetary[2] 297 minor planetary[3])
Known minor planets	707,664  (as of 2016-03-07)[4]
Known comets	3,406  (as of 2016-03-07)[4]
Identified rounded satellites	19
Orbit about Galactic Center
Invariable-to-galactic plane inclination	60.19°  (ecliptic)
Distance to Galactic Center	27,000 ± 1,000 ly
Orbital speed	220 km/s
Orbital period	225–250 Myr
Star-related properties
Spectral type	G2V
Frost line	≈5 AU[5]
Distance to heliopause	≈120 AU
Hill sphere radius	≈1–3 ly

Solar System

Objects
by orbit by size by discovery date
Lists
Gravitationally-rounded (equilibrium) objects Possible dwarf planets Moons (natural satellites) Minor planets Comets Asteroids
Solar System portal  Star portal
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