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Size of objects[edit]
List of objects
| Name
|
Diameter
|
Notes
|
| UY Scuti |
2,377,536,000 km |
The largest known star, this star is 1,708 times larger than the sun.
|
| NML Cygni |
2,296,800,000 km |
This star is so large, it could reach out to Earth's distance from the sun seven times.
|
| PZ Cassiopeiae |
2,178,480,000 km |
|
| Westerlund 1-26 |
2,164,560,000 km |
|
| WOH G64 |
2,143,680,000 km |
The largest known star in the LMC, this star is only the fifth largest known star.
|
| VX Sagittarii |
2,115,840,000 km |
|
| VV Cephei A |
2,053,200,000 km |
|
| RW Cephei |
1,997,520,000 km |
|
| VY Canis Majoris |
1,976,640,000 km |
Once thought to be a star so large that it contradicted stellar evolutionary theory, improved measurements have brought it down to size.
|
| KY Cygni |
1,976,640,000 km |
|
| AH Scorpii |
1,964,112,000 km |
|
| Betelgeuse |
1,496,400,000 km |
The largest known star with a proper name, and the Alpha star in Orion. This star is set to explode in a supernova any time now.
|
| Mu Cephei (Erakis) |
1,440,720,000 km |
|
| Antares A |
1,229,136,000 km |
The Alpha star in Scorpius.
|
| Mira A |
556,800,000 km |
Prototype Mira variable.
|
| Chi Cygni |
439,872,000 km |
|
| Pistol Star |
425,952,000 km |
|
| Deneb |
282,576,000 km |
|
| Rigel |
109,828,800 km |
The Beta star in Orion.
|
| Canopus |
99,388,800 km |
The brightest and Alpha Star in Carina, and the second brightest star in the night sky.
|
| Albireo Aa |
97,440,000 km |
|
| Polaris A |
64,032,000 km |
The north star.
|
| Aldebaran |
61,526,400 km |
|
| R136a1 |
49,276,800 km |
The most massive known star, but not the largest.
|
| Arcturus |
35,774,400 km |
|
| Sagittarius A* |
25,460,374 km |
|
| Adhara
|
19,348,800 km
|
|
| Capella A |
16,982,400 km |
|
| Pollux |
12,249,600 km |
|
| VV Cephei B |
11,136,000 km |
|
| Bellatrix
|
8,352,000 km
|
|
| Albireo Ac |
4,872,000 km |
|
| Regulus |
4,304,064 km |
|
| Vega |
3,922,656 km |
|
| Albireo B |
3,758,400 km |
|
| Procyon A |
2,850,816 km |
|
| Altair |
2,825,760 km |
|
| Sirius A |
2,366,400 km |
The brightest star in the night sky.
|
| IK Pegasi A |
2,227,200 km |
|
| Alpha Centauri A |
1,707,984 km |
|
| Sun |
1,392,000 km |
The largest body in the solar system, yet it is tiny compared to the stars above.
|
| Alpha Centauri B |
1,204,080 km |
|
| 40 Eridani A |
1,127,520 km |
The largest star in the triple star system 40 Eridani.
|
| Epsilon Eridani |
1,023,120 km |
|
| Gliese 229 A |
960,480 km |
One of the largest known red dwarfs.
|
| Luyten's Star |
487,200 km |
|
| 40 Eridani C |
431,520 km |
|
| Kapteyn's Star |
405,072 km |
|
| CT Cha b |
320,160 km |
The largest known exoplanet, it is over twice as large as Jupiter.
|
| HAT-P-32b |
291,258 km |
|
| GJ 1214 |
287,308 km |
|
| Barnard's Star |
272,832 km |
|
| Cha 110913-773444 |
257,371 km |
|
| Wolf 359 |
222,720 km |
|
| Proxima Centauri |
196,272 km |
The nearest star to our own.
|
| TrES-2b |
181,875 km |
The darkest known exoplanet, it reflects less than 1% of the light it receives.
|
| Kepler-40b |
167,291 km |
|
| Jupiter |
142,984 km |
The largest and most massive planet in the solar system.
|
| Gliese 229 B |
130,848 km |
One of the smallest known brown dwarfs.
|
| Saturn |
120,536 km |
This planet has the most obvious rings.
|
| TYC 1-900-0 |
84,912 km |
The white dwarf in the Helix Nebula.
|
| HAT-P-11b |
60,339 km |
|
| Uranus |
51,118 km |
This planet has the most tilt.
|
| Neptune |
49,528 km |
This planet is the farthest from the sun.
|
| Kepler-22b |
30,529 km |
An exoplanet that is in its star's habitable zone.
|
| Kepler-37d |
25,356 km |
|
| 40 Eridani B |
19,488 km |
One of the largest white dwarfs known.
|
| Procyon B |
17,177 km |
The second nearest white dwarf to the sun.
|
| Van Maanen's Star |
15,312 km |
The nearest single white dwarf to the sun.
|
| Earth |
12,742 km |
The home of mankind.
|
| Venus |
12,102 km |
The hottest planet in the solar system.
|
| Sirius B |
11,692 km |
The nearest white dwarf to the sun.
|
| Kepler-37c |
9,454 km |
|
| IK Pegasi B |
8,352 km |
One of the smallest white dwarfs known.
|
| Mars |
6,792 km |
This planet has the tallest mountain in the solar system, Olympus Mons.
|
| Ganymede |
5,268 km |
The largest moon in the solar system, it is bigger than Mercury.
|
| Titan |
5,152 km |
|
| Mercury |
4,878 km |
The second smallest planet in the solar system.
|
| Callisto |
4,820 km |
|
| Kepler-37b |
3,860 km |
The smallest known exoplanet.
|
| Io |
3,642 km |
The most volcanically active object in the solar system.
|
| Moon |
3,474 km |
The only natural satellite of Earth.
|
| Europa |
3,120 km |
|
| Triton |
2,706 km |
|
| Pluto |
2,372 km |
The smallest planet in the solar system.
|
| Eris |
2,326 km |
|
| Sedna |
1,990 km |
|
| Titania |
1,576 km |
The largest moon of Uranus.
|
| Rhea |
1,528 km |
This moon may possibly have rings.
|
| Oberon |
1,522 km |
|
| Iapetus |
1,470 km |
|
| Makemake |
1,430 km |
|
| Haumea |
1,380 km |
|
| 2007 OR10 |
1,280 km |
|
| Charon |
1,208 km |
|
| Umbriel |
1,170 km |
|
| Ariel |
1,156 km |
|
| Dione |
1,122 km |
|
| Tethys |
1,062 km |
|
| Ceres |
974 km |
The largest object in the asteroid belt.
|
| Dysnomia |
680 km |
|
| Pallas |
544 km |
|
| Vesta |
525 km |
|
| Enceladus |
504 km |
|
| Miranda |
470 km |
|
| Proteus |
420 km |
|
| Mimas |
396 km |
|
| Hyperion |
270 km |
|
| Itokawa |
692 m |
|
| Golevka |
530 m |
|
| Aegaeon |
500 m |
|
| 2005 YU55 |
360 m |
|
| Apophis |
325 m |
|
| S/2009 S 1 |
300 m |
|
| 1994 WR12 |
130 m |
|
| 2009 FD |
130 m |
|
| 2008 HJ |
36 m |
|
| Duende |
30 m |
|
| 1998 KY26 |
30 m |
The smallest known astronomical body.|}|}
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