Welcome to The Solar System Wiki!
Saturday, June 21, 2025
Founded by MrScience12 July 27, 2012
Adopted by Lemniscate Biscuit November 13, 2023
Welcome to the Solar System Wiki! Our wiki is an encyclopedia-like resource that uses simple wording to educate its readers. Articles include:
- objects (like planets, moons, minor planets, etc.)
- lists
- hypothetical topics (like the Nice Model, Vulcan, Planet Nine, etc.)
- geologic features (such as Olympus Mons or Pluto's Heart)
- regions (for example the Kuiper Belt, Asteroid Belt, etc.)
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Saturn
Blogs
Archive:List of spacecraft visits to planets and others
This is a list of interplanetary spacecraft that…
June 21, ca. 2500 B.C.E.: Summering at Stonehenge - Elisa Neckar - 2025/06/21 13:00
- Stonehenge, the infamous stone circle on Salisbury Plain, U.K., dates to around 2500 B.C.E. The monument is aligned so that if you are standing at the center of the ring on the summer soltice (which c...
The Sky Today on Saturday, June 21: The Queen’s colorful double star - Alison Klesman - 2025/06/21 05:00
- Cassiopeia the Queen swings in a wide circle around the North Celestial Pole, visible much of (if not all of) the night for most northern observers. This evening around 11:30 P.M. local daylight time,...
‘First light’ images from Vera C. Rubin Observatory coming Monday: Here’s how to watch - Alison Klesman - 2025/06/20 17:56
- The National Science Foundation and U.S. Department of Energy’s Vera C. Rubin Observatory has been under construction atop Cerro Pachón in Chile since 2015. Housing an 8.4-meter telescope coupled with...
Honda achieves milestone with reusable rocket test - Brooks Mendenhall - 2025/06/20 17:38
- In a bold shift beyond its automotive roots, Honda has quietly entered the spaceflight arena, unveiling a small experimental rocket capable of vertical takeoff and landing. On June 17 at 4:50 p.m. lo...
What is there to observe in Serpens? - Michael E. Bakich - 2025/06/20 16:00
- Serpens the Serpent is unique among the constellations because it’s separated into two parts with Ophiuchus the Serpent-bearer between them. Serpens Caput (the head of the serpent) lies to the west of...
Michael’s Miscellany: 10 Cool Things About the Moon - Michael E. Bakich - 2025/06/20 14:25
- Here’s a fun list of facts about the Moon. It’s not just for lovers, you know. #1. The Moon is not a star or a planet, it’s a satellite. In fact, it’s Earth’s only natural satellite. (We distinguish t...
SpaceX Starship explodes on test stand ahead of 10th flight - Mark Zastrow - 2025/06/20 13:57
- SpaceX’s massive Starship rocket suffered failures on its past three test flights in January, March, and May. And the setbacks keep coming. Ahead of a 6-engine static fire test Wednesday evening, Star...
2025 Full Moon calendar: When to see the Full Moon and phases - Jake Parks - 2025/06/20 13:21
- The phenomenon of a Full Moon arises when our planet, Earth, is precisely sandwiched between the Sun and the Moon. This alignment ensures the entire side of the Moon that faces us gleams under sunligh...
June 20, 1955: Pingualuit Crater is discovered - Elisa Neckar - 2025/06/20 13:00
- On June 20, 1943, Pingualuit Crater (formerly known as Chubb Crater and as the New Quebec Crater) was first photographed by a U.S. Army Air Force crew during a meterological flight over northern Quebe...
You’re gonna need a bigger scope - Mark Zastrow - 2025/06/20 10:00
- Adriano Anfuso, taken from Wincrange, Luxembourg The Shark Nebula (LDN 1235) is a cloud of gas and dust that prowls the constellation Cepheus. Its “body” is dotted by young, blue stars whose light ref...