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  2. List of Solar System objects by size - Wikipedia

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

    This list contains a selection of objects 50 and 99 km in radius (100 km to 199 km in average diameter). The listed objects currently include most objects in the asteroid belt and moons of the giant planets in this size range, but many newly discovered objects in the outer Solar System are missing, such as those included in the following ...

  3. Venus - Wikipedia

    en.wikipedia.org/wiki/Venus

    It has a diameter of 12,103.6 km (7,520.8 mi)—only 638.4 km (396.7 mi) less than Earth's—and its mass is 81.5% of Earth's, making it the third-smallest planet in the Solar System. Conditions on the surface of Venus differ radically from those on Earth because its dense atmosphere is 96.5% carbon dioxide, causing an intense greenhouse effect ...

  4. Solar radius - Wikipedia

    en.wikipedia.org/wiki/Solar_radius

    Solar radius is a unit of distance used to express the size of stars in astronomy relative to the Sun. The solar radius is usually defined as the radius to the layer in the Sun's photosphere where the optical depth equals 2/3: [1] =

  5. Angular diameter - Wikipedia

    en.wikipedia.org/wiki/Angular_diameter

    an object of diameter 1 cm at a distance of 2.06 km; an object of diameter 725.27 km at a distance of 1 astronomical unit (AU) an object of diameter 45 866 916 km at 1 light-year; an object of diameter 1 AU (149 597 871 km) at a distance of 1 parsec (pc) Thus, the angular diameter of Earth's orbit around the Sun as viewed from a distance of 1 ...

  6. File:Comparison angular diameter solar system.svg - Wikipedia

    en.wikipedia.org/wiki/File:Comparison_angular...

    To get a true representation of the sizes, view the image at a distance of 103 [1 / tan(33.5/60 * pi/180)] times the width of the largest (Moon: max.) circle. For example, if this circle is 10 cm wide on your monitor, view it from 10.3 m away.

  7. Orders of magnitude (length) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(length)

    115 Mmwidth of Saturn's Rings; 120 Mmdiameter of EBLM J0555-57Ab, the smallest-known star; 120 Mmdiameter of Saturn; 142 Mmdiameter of Jupiter, the largest planet in the Solar System; 170 Mmdiameter of TRAPPIST-1, a star discovered to have seven planets around it; 174 Mmdiameter of OGLE-TR-122b, one of the smallest ...

  8. List of smallest exoplanets - Wikipedia

    en.wikipedia.org/wiki/List_of_smallest_exoplanets

    Kepler-37e is listed with a radius of 0.37 ± 0.18 R 🜨 in the Exoplanet Archive based on KOI data, but the existence of this planet is doubtful, [22] and assuming its existence, a 2023 study found a mass of 8.1 ± 1.7 M 🜨, inconsistent with such a small radius.

  9. Geology of Venus - Wikipedia

    en.wikipedia.org/wiki/Geology_of_Venus

    The surface of Venus is comparatively flat. When 93% of the topography was mapped by Pioneer Venus Orbiter, scientists found that the total distance from the lowest point to the highest point on the entire surface was about 13 kilometres (8.1 mi), about the same as the vertical distance between the Earth's ocean floor and the higher summits of the Himalayas.