Last stop before leaving the solar system Sep 23, 2021

Last stop before leaving the solar system

Official telescopic confirmation of Neptune"s presence in our solar system came on September 23, 1846, and it was a big deal partly because Neptune is the only planet in our solar system not visible with the naked eye. Credit for this discovery inspired a dust-up in the international astronomy community, as scientists from both Britain and France claimed they had been the first to predict the existence and position of the eighth and most-distant planet in our solar system before it was seen through a telescope. Eventually peace was brokered, and credit is now shared between the two factions.

© NASA/JPL

palette

Today in History

Sep 23, 2018Ahh-tumn
Sep 23, 2019Stepping into autumn
Sep 23, 2020A tree of many memories
Sep 23, 2022Golden jellyfish in Jellyfish Lake, Palau
Sep 23, 2023Autumnal equinox
Sep 23, 2024Sea Otter Awareness Week
Sep 23, 2025A keel-billed toucan in Costa Rica

More Desktop Wallpapers:

Apr 8, 2019Ready, set, read
May 21, 2026International Tea Day
Jun 8, 2018Green sea turtle on World Oceans Day
Sep 21, 2021An old celebration for a new season
May 10, 2021An ancient sailing tradition takes to the water
Jan 26, 2022India Republic Day
Jun 24, 2019A summertime light show
Jan 29, 2026Milwaukee City Hall, Wisconsin
Jul 30, 2023Palouse farmland, Washington state
Jan 20, 2022Penguin Awareness Day
Jan 22, 2023Mountain hare hopping into Lunar New Year
Jan 4, 2022Borrego Badlands
Jul 26, 2023International Day of Mangrove Conservation
Dec 1, 2023Antarctica Day
Jul 18, 2018Celebrate Mandela Day
Nov 12, 2023Diwali
Nov 19, 2022Zion National Park turns 103
May 25, 2019Traveling warblers
Feb 22, 2022Twosday
Jan 7, 2019An avian predator built for the snow
Sep 22, 2024Autumnal equinox
Mar 1, 2024Womens History Month
Jul 4, 2020Happy Independence Day!
Sep 5, 2025Pacific Park, Santa Monica State Beach, California
Sep 20, 2025Oktoberfest begins!
Nov 23, 2018Let the holiday shopping commence
May 17, 2023Natural Bridges State Beach in Santa Cruz, California
Jun 7, 2023Chaco Culture National Historical Park, New Mexico
Oct 30, 2020Who s there? The largest owl in the world
May 6, 2024The Roaches ridge in the Peak District, England