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Solar radius
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==Examples== Solar radii as a unit are common when describing spacecraft moving close to the sun. Two spacecraft in the 2010s include: *[[Solar Orbiter]] (as close as {{val|45|u=solar radius}}) *[[Parker Solar Probe]] (as close as {{val|9|u=solar radius}}) {|class="wikitable" |+Radius of another objects relative to the Sun's radius !Name !Radius {{nowrap|(Solar radius)}} !Radius ([[kilometers]]) |- |[[Milky Way]] |{{val|5.94|e=11}} |{{val|4.134|e=17}}<ref>{{Cite journal |last1=Goodwin |first1=S. P. |last2=Gribbin |first2=J. |last3=Hendry |first3=M. A. |date=1998-08-01 |title=The relative size of the Milky Way |url=https://ui.adsabs.harvard.edu/abs/1998Obs...118..201G |journal=The Observatory |volume=118 |pages=201–208 |bibcode=1998Obs...118..201G |issn=0029-7704}}</ref> |- |[[UY Scuti]] |909<ref>{{Cite journal |last1=Healy |first1=Sarah |last2=Horiuchi |first2=Shunsaku |last3=Molla |first3=Marta Colomer |last4=Milisavljevic |first4=Dan |last5=Tseng |first5=Jeff |last6=Bergin |first6=Faith |last7=Weil |first7=Kathryn |last8=Tanaka |first8=Masaomi |date=2024-03-23 |title=Red Supergiant Candidates for Multimessenger Monitoring of the Next Galactic Supernova |journal=Monthly Notices of the Royal Astronomical Society |volume=529 |issue=4 |pages=3630–3650 |doi=10.1093/mnras/stae738 |doi-access=free |arxiv=2307.08785 |bibcode=2024MNRAS.529.3630H |issn=0035-8711}}</ref> |{{val|632400000|fmt=commas}} |- |[[Betelgeuse]] |764<ref>{{Cite journal |last1=Joyce |first1=Meridith |last2=Leung |first2=Shing-Chi |last3=Molnár |first3=László |last4=Ireland |first4=Michael |last5=Kobayashi |first5=Chiaki |last6=Nomoto |first6=Ken'ichi |date=2020-10-01 |title=Standing on the Shoulders of Giants: New Mass and Distance Estimates for Betelgeuse through Combined Evolutionary, Asteroseismic, and Hydrodynamic Simulations with MESA |journal=The Astrophysical Journal |volume=902 |issue=1 |pages=63 |doi=10.3847/1538-4357/abb8db |doi-access=free |arxiv=2006.09837 |bibcode=2020ApJ...902...63J |issn=0004-637X}}</ref> |{{val|531500000|fmt=commas}} |- |[[Antares]] A |680<ref>{{Cite journal |last1=Ohnaka |first1=K. |last2=Hofmann |first2=K. -H. |last3=Schertl |first3=D. |last4=Weigelt |first4=G. |last5=Baffa |first5=C. |last6=Chelli |first6=A. |last7=Petrov |first7=R. |last8=Robbe-Dubois |first8=S. |date=2013-07-01 |title=High spectral resolution imaging of the dynamical atmosphere of the red supergiant Antares in the CO first overtone lines with VLTI/AMBER |url=https://ui.adsabs.harvard.edu/abs/2013A&A...555A..24O |journal=Astronomy and Astrophysics |volume=555 |pages=A24 |doi=10.1051/0004-6361/201321063 |arxiv=1304.4800 |bibcode=2013A&A...555A..24O |issn=0004-6361}}</ref> |{{val|473076000|fmt=commas}} |- |[[Rigel]] A |74.1<ref>{{Cite journal |last1=Baines |first1=Ellyn K. |last2=Armstrong |first2=J. Thomas |last3=Schmitt |first3=Henrique R. |last4=Zavala |first4=R. T. |last5=Benson |first5=James A. |last6=Hutter |first6=Donald J. |last7=Tycner |first7=Christopher |last8=van Belle |first8=Gerard T. |date=2018-01-01 |title=Fundamental Parameters of 87 Stars from the Navy Precision Optical Interferometer |journal=The Astronomical Journal |volume=155 |issue=1 |pages=30 |doi=10.3847/1538-3881/aa9d8b |doi-access=free |arxiv=1712.08109 |bibcode=2018AJ....155...30B |issn=0004-6256}}</ref> |{{val|51550000|fmt=commas}} |- |[[Aldebaran]] |45.1<ref>{{Cite journal |last1=Hatzes |first1=A. P. |last2=Cochran |first2=W. D. |last3=Endl |first3=M. |last4=Guenther |first4=E. W. |last5=MacQueen |first5=P. |last6=Hartmann |first6=M. |last7=Zechmeister |first7=M. |last8=Han |first8=I. |last9=Lee |first9=B. -C. |last10=Walker |first10=G. A. H. |last11=Yang |first11=S. |last12=Larson |first12=A. M. |last13=Kim |first13=K. -M. |last14=Mkrtichian |first14=D. E. |last15=Döllinger |first15=M. |date=2015-08-01 |title=Long-lived, long-period radial velocity variations in Aldebaran: A planetary companion and stellar activity |url=https://ui.adsabs.harvard.edu/abs/2015A&A...580A..31H |journal=Astronomy and Astrophysics |volume=580 |pages=A31 |doi=10.1051/0004-6361/201425519 |arxiv=1505.03454 |bibcode=2015A&A...580A..31H |issn=0004-6361}}</ref> |{{val|31375000|fmt=commas}} |- |[[Arcturus]] |25.4<ref>{{Cite journal |last1=Ramírez |first1=I. |last2=Allende Prieto |first2=C. |date=2011-12-01 |title=Fundamental Parameters and Chemical Composition of Arcturus |url=https://ui.adsabs.harvard.edu/abs/2011ApJ...743..135R |journal=The Astrophysical Journal |volume=743 |issue=2 |pages=135 |doi=10.1088/0004-637X/743/2/135 |arxiv=1109.4425 |bibcode=2011ApJ...743..135R |issn=0004-637X}}</ref> |{{val|17670000|fmt=commas}} |- |[[Pollux (star)|Pollux]] |9.06<ref>{{Cite journal |last1=Baines |first1=Ellyn K. |last2=Armstrong |first2=J. Thomas |last3=Schmitt |first3=Henrique R. |last4=Zavala |first4=R. T. |last5=Benson |first5=James A. |last6=Hutter |first6=Donald J. |last7=Tycner |first7=Christopher |last8=Belle |first8=Gerard T. van |date=2017-12-21 |title=Fundamental Parameters of 87 Stars from the Navy Precision Optical Interferometer |journal=The Astronomical Journal |volume=155 |issue=1 |pages=30 |doi=10.3847/1538-3881/aa9d8b |doi-access=free |issn=0004-6256|arxiv=1712.08109 |bibcode=2018AJ....155...30B }}</ref> |{{val|6300000|fmt=commas}} |- |[[Sirius]] A |1.711<ref>{{Cite journal |last1=Liebert |first1=James |last2=Young |first2=Patrick A. |last3=Arnett |first3=David |last4=Holberg |first4=J. B. |last5=Williams |first5=Kurtis A. |date=2005-09-01 |title=The Age and Progenitor Mass of Sirius B |url=https://ui.adsabs.harvard.edu/abs/2005ApJ...630L..69L |journal=The Astrophysical Journal |volume=630 |issue=1 |pages=L69–L72 |doi=10.1086/462419 |arxiv=astro-ph/0507523 |bibcode=2005ApJ...630L..69L |issn=0004-637X}}</ref> |{{val|1190350|fmt=commas}} |-style="background:#faf86b;" |[[Sun]] |1 |{{val|695700|fmt=commas}} |- |[[Proxima Centauri]] |0.1542<ref>{{Cite journal |last1=Kervella |first1=P. |last2=Thévenin |first2=F. |last3=Lovis |first3=C. |date=February 2017 |title=Proxima's orbit around Alpha Centauri |journal=Astronomy & Astrophysics |volume=598 |pages=L7 |doi=10.1051/0004-6361/201629930 |arxiv=1611.03495 |bibcode=2017A&A...598L...7K |issn=0004-6361}}</ref> |{{val|107275|fmt=commas}} |- |[[Jupiter]] |0.1028 |{{val|71492|fmt=commas}}<ref name=":0">{{Cite web |title=Planetary Physical Parameters |url=https://ssd.jpl.nasa.gov/planets/phys_par.html |access-date=January 24, 2024 |website=Jet Propulsion Laboratory}}</ref> |- |[[Saturn]] |0.0866 |{{val|60268|fmt=commas}}<ref name=":0" /> |- |[[Uranus]] |0.03673 |{{val|25559|fmt=commas}}<ref name=":0" /> |- |[[Neptune]] |0.03559 |{{val|24764|fmt=commas}}<ref name=":0" /> |- |[[Earth]] |0.009168 |{{val|6378|fmt=commas}}<ref name=":0" /> |- |[[Venus]] |0.00869 |{{val|6051.8|fmt=commas}}<ref name=":0" /> |- |[[Mars]] |0.00488 |{{val|3396.19|fmt=commas}}<ref name=":0" /> |- |[[Mercury (planet)|Mercury]] |0.0035 |{{val|2440.53|fmt=commas}}<ref name=":0" /> |- |[[Moon]] |0.0025 |{{val|1738.1|fmt=commas}}<ref>{{Cite web |title=Moon Fact Sheet |url=https://nssdc.gsfc.nasa.gov/planetary/factsheet/moonfact.html |access-date=January 24, 2024 |website=nssdc.gsfc.nasa.gov}}</ref> |- |[[Pluto]] |0.0017 |{{val|1188.3|fmt=commas}}<ref name=":0" /> |}
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