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  2. Sidereal year - Wikipedia

    en.wikipedia.org/wiki/Sidereal_year

    The sidereal year differs from the solar year, "the period of time required for the ecliptic longitude of the Sun to increase 360 degrees", [2] due to the precession of the equinoxes. The sidereal year is 20 min 24.5 s longer than the mean tropical year at J2000.0 (365.242 190 402 ephemeris days) .

  3. Rotation period (astronomy) - Wikipedia

    en.wikipedia.org/wiki/Rotation_period_(astronomy)

    In astronomy, the rotation period or spin period [1] of a celestial object (e.g., star, planet, moon, asteroid) has two definitions. The first one corresponds to the sidereal rotation period (or sidereal day ), i.e., the time that the object takes to complete a full rotation around its axis relative to the background stars ( inertial space ).

  4. Galactic year - Wikipedia

    en.wikipedia.org/wiki/Galactic_year

    The galactic year, also known as a cosmic year, is the duration of time required for the Sun to orbit once around the center of the Milky Way Galaxy. [1] One galactic year is approximately 225 million Earth years . [ 2 ]

  5. Light-year - Wikipedia

    en.wikipedia.org/wiki/Light-year

    10 6: 2.5 × 10 6 ly: The Andromeda Galaxy is approximately 2.5 million light-years away. 3 × 10 6 ly: The Triangulum Galaxy , at about 3 million light-years away, is the most distant object visible to the naked eye. 5.9 × 10 7 ly: The nearest large galaxy cluster, the Virgo Cluster, is about 59 million light-years away. 1.5 × 10 8 – 2.5 ...

  6. Cosmic Calendar - Wikipedia

    en.wikipedia.org/wiki/Cosmic_Calendar

    A graphical view of the Cosmic Calendar, featuring the months of the year, days of December, the final minute, and the final second. The Cosmic Calendar is a method to visualize the chronology of the universe, scaling its currently understood age of 13.8 billion years to a single year in order to help intuit it for pedagogical purposes in science education or popular science.

  7. Calculator (Apple) - Wikipedia

    en.wikipedia.org/wiki/Calculator_(Apple)

    A calculator function has been included with iOS since its launch on iPhone [8] and iPod Touch. [9] A native calculator function was added to the Apple Watch with watchOS 6, which included a dedicated button for calculating tips. [10] The Calculator app was not available on Apple's iPad tablet until the release of iPadOS 18 in September

  8. Download and install the AOL app on iOS

    help.aol.com/articles/aol-app-downloading-and...

    Learn more about the AOL app and download it from the App Store. The AOL app is available for iOS devices running iOS 12 or newer. Open the App Store on your device. Tap the Search icon. Type "AOL" in the search field. Tap Search. Next to "AOL: News Email Weather Video", tap Get. Enter your Touch ID or Apple ID, if prompted. Tap Open.

  9. iPad (9th generation) - Wikipedia

    en.wikipedia.org/wiki/IPad_(9th_generation)

    The ninth-generation iPad was discontinued on May 7, 2024, with the announcement of the iPad Air (6th generation) and the iPad Pro (7th generation). It was the last iPad model to have a home button, Lightning port and headphone jack. [5] The iPad 9th generation was later replaced with the 10th generation in October 2022.