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SpaceX Falcon 9 “Space Mouse” Explained



SpaceX Falcon 9

SpaceX launched the manned SpaceX Dragon capsule on Sunday, May 31st 2020. Online spectators are seeing a mouse crawling around the expansion nozzle. Is this about a mouse on the Falcon 9 rocket?

[fa class=”far fa-times-circle fa-5x”] False, we do not see a mouse near the expansion nozzle of the Falcon 9 rocket but a by-product of leaking liquid oxygen. The Merlin is developed by SpaceX and liquid oxygen next to Kerosene (RP-1) are used as propellants. The white clumps can also be seen during the 2019 CRS-19 mission on the Merlin and in 2017 during the SpaceX Dragon mission. This is known as the Leidenfrost effect.

“Looks like a MOUSE hitchhiked a ride on Elon Musk’s SpaceX rocket launch today,” says a Twitter user. In the video below, a large audience of people claims the white sliding clump is a mouse.



In the 2017 SpaceX Dragon mission and the CRS-19 Mission of December 5, 2019 in which the Falcon 9 rocket landed in the Atlantic ocean, clumps of liquid were sliding and dropping from Merlin’s expansion nozzle. Witness, watch the video below.

Courtesy VideoFromSpace


No living creature can survive conditions without oxygen and can stand the catastrophic heat. The diameter of the expansion nozzle is at least 1.25 m (4.1 ft) and the average length of a Deer Mouse is 9.6 cm. This means the creature in the video must be a giant mouse because the ratio does not match the average mouse living in the United States.

The white clumps is a by-product of liquid oxygen also known as the Leidenfrost effect.

The Leidenfrost effect is the phenomenon whereby a liquid that comes into contact with a surface that is much hotter (warmer than the Leidenfrost point) forms a thermally insulating vapor layer that prevents the liquid from boiling.


Heathcliff Spencer Peters, born and raised in the Netherlands, has worked with Dutch and American artists as creative artist for over 10 years. From 2000 - 2001 he was the main character in a popular Dutch television docu-soap-travel program. He has also worked as a cameraman and video producer for over 11 years. In addition to his work experience, he has been practicing journalism and fact-checking since 2007 for Lions Ground, nowadays known as Astral Citizens.


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