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  2. List of largest stars - Wikipedia

    en.wikipedia.org/wiki/List_of_largest_stars

    Below are lists of the largest stars currently known, ordered by radius and separated into categories by galaxy. The unit of measurement used is the radius of the Sun (approximately 695,700 km; 432,300 mi). [ 1 ] The Sun, the orbit of Earth, Jupiter, and Neptune, compared to four stars.

  3. List of Solar System objects by size - Wikipedia

    en.wikipedia.org/wiki/List_of_Solar_System...

    Relative masses of the Solar planets. Jupiter at 71% of the total and Saturn at 21% dominate the system. Relative masses of the solid bodies of the Solar System. Earth at 48% and Venus at 39% dominate. Bodies less massive than Pluto are not visible at this scale. Relative masses of the rounded moons of the Solar System.

  4. Betelgeuse - Wikipedia

    en.wikipedia.org/wiki/Betelgeuse

    Betelgeuse, α Ori, 58 Ori, HR 2061, BD +7°1055, HD 39801, FK5 224, HIP 27989, SAO 113271, GC 7451, CCDM J05552+0724, AAVSO 0549+07. Database references. SIMBAD. data. Betelgeuse is a red supergiant star in the constellation of Orion. It is usually the tenth-brightest star in the night sky and, after Rigel, the second-brightest in its ...

  5. HD 40307 g - Wikipedia

    en.wikipedia.org/wiki/HD_40307_g

    Approximate size comparison of HD 40307 g with Earth. HD 40307 g is an exoplanet candidate suspected to be orbiting in the habitable zone of HD 40307. It is located 42 light-years away in the direction of the southern constellation Pictor. The planet was discovered by the radial velocity method, using the European Southern Observatory's HARPS ...

  6. HD 100546 - Wikipedia

    en.wikipedia.org/wiki/HD_100546

    HD 100546, also known as KR Muscae, is a pre-main sequence star of spectral type B8 to A0 located 353 light-years (108 parsecs) from Earth in the southern constellation of Musca. [4] The star is surrounded by a circumstellar disk from a distance of 0.2 to 4 AU, and again from 13 AU out to a few hundred AU, with evidence for a protoplanet ...

  7. Stellar classification - Wikipedia

    en.wikipedia.org/wiki/Stellar_classification

    In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a prism or diffraction grating into a spectrum exhibiting the rainbow of colors interspersed with spectral lines. Each line indicates a particular chemical element ...

  8. HD 149026 b - Wikipedia

    en.wikipedia.org/wiki/HD_149026_b

    HD 149026 b, formally named Smertrios / ˈ s m ɜːr t r i ɒ s /, is an extrasolar planet and hot Jupiter approximately 250 light-years from the Sun in the constellation of Hercules.. The 2.8766-day period planet orbits the yellow subgiant star HD 149026 at a distance of 0.042 AU (3.9 million mi; 6.3 million km) and is notable first as a transiting planet, and second for a small measured ...

  9. TrES-2b - Wikipedia

    en.wikipedia.org/wiki/TrES-2b

    TrES-2b. TrES-2b (also known as Kepler-1b or GSC 03549-02811b) is an extrasolar planet orbiting the star GSC 03549-02811 located 750 light years away from the Solar System. The planet was identified in 2011 as the darkest known exoplanet, reflecting less than 1% of any light that hits it. Reflecting less light than charcoal, on the surface the ...