The National Mall in Washington, District of Columbia — The American Northeast (Mid-Atlantic)
Top of marker:
This is the planet Neptune and its largest moon at one 10-billionth of its size.
If Neptune were this big, how far away would the Sun and other planets be? Look at the map on the lower panel to find your position in the solar system.
Bottom of marker:
Voyage to Neptune
A stunning blue world with a system of rings and at least 13 moons. Neptune shines in the sky above its largest moon, Triton. The face of Neptune is not an ocean of water, but an atmosphere of mostly hydrogen and helium. The blue color is due to the methane gas in the atmosphere.
A Fiercely Windy World
Neptune is the windiest planet in the solar system, with gales tearing across its face at more than 1,000 mph (1,600 km/hr) and dark, swirling storms as big as Earth. We don't yet understand what powers such extreme weather here in the frigid outer reaches of the solar system.
Triton: Giant Geysers
Neptune's moon Triton (left) is a frigid world with a thin atmosphere. The surface temperature is -390°F (-230°C), yet active Geysers spew crystallized nitrogen and dust miles into the sky. Winds draw the geyser plumes into long clouds, and an icy rain coats the surface.
Walk to Uranus about 246
Like Earth, Neptune has four seasons. Each season is 41 Earth years long.
Walk to Pluto about 207 steps
Voyage is an exhibition of the National Center for Earth and Space Science Education and the Smithsonian Institution. It is designed for permanent installation in communities worldwide.
Erected by Smithsonian Institution.
Location. 38° 53.319′ N, 77° 1.414′ W. Marker is in The National Mall, District of Columbia, in Washington. Marker is on Jefferson Drive Southwest 0.1 miles west of 7th Street SW, on the right when traveling east. Touch for map. Marker is in this post office area: Washington DC 20560, United States of America.
Other nearby markers. At least 8 other markers are within walking distance of this marker. Large Acanthus Fountain (within shouting distance of this marker); Welcome to the Hirshhorn Museum's Sculpture Garden (within shouting distance of this marker); Welcome to the Hirshhorn Museum's Plaza (within shouting distance of this marker); a different marker also named Welcome to the Hirshhorn Museum's Sculpture Garden (within A Common Language (within shouting distance of this marker); Arts and Industries Building (within shouting distance of this marker); a different marker also named Arts and Industries Building (was within shouting distance of this marker but has been reported missing. ); a different marker also named Welcome to the Hirshhorn Museum's Sculpture Garden (within shouting distance of this marker). Touch for a list and map of all markers in The National Mall.
Categories. • Air & Space •
Credits. This page was last revised on December 11, 2017. This page originally submitted on November 28, 2017, by Devry Jones of Washington, District of Columbia. This page has been viewed 51 times since then and 19 times this year. Photos: 1, 2, 3, 4. submitted on November 28, 2017, by Devry Jones of Washington, District of Columbia. • Bill Pfingsten was the editor who published this page.