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In a cometary coma, various hydrogen compounds, especially water, that are photodissociated by solar UV radiation form a gigantic hydrogen cloud with a radius of several million kilometers around the cometary nucleus. These cometary hydrogen clouds have been observed by a number of spacecraft outside the terrestrial atmosphere and in interplanetary space. For instance, the hydrogen cloud of Comet Halley was a good target for the ultraviolet photometers and spectrometers on board the IUE, Suisei, Pioneer Venus, DE-1, and sounding rockets. Hydrogen cloud activity could be used as a good measure of cometary activity, but some problems remain to be explored in the future.
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Are comets and asteroids surrounded by hydrogen cloud?
Some comets develop a cloud of hydrogen gas around them when they get close to the sun, due to the sun's radiation breaking apart water molecules in the comet's icy nucleus. This creates a temporary hydrogen cloud known as a coma. Asteroids generally do not have hydrogen clouds since they are composed of rock and metal, lacking the icy material that comets have.
Which terrestrial planet is permanently covered in clouds?
Venus is the terrestrial planet that is permanently covered in clouds. Its thick atmosphere is composed mainly of carbon dioxide with clouds of sulfuric acid, which create a dense layer that obscures the planet's surface from view.
Is asteroids surrounded by hydrogen clouds?
No, asteroids are rocky, metallic bodies that generally do not have atmospheres or hydrogen clouds surrounding them. Hydrogen clouds are more commonly found in gaseous planets like Jupiter or Saturn.
What are huge clouds of helium and hydrogen called?
Vast interstellar clouds of hydrogen are known as "nebula."
What is the term for swirling clouds of hydrogen gas out of which stars are born?
The term for swirling clouds of hydrogen gas out of which stars are born is "nebula."
Are comets and asteroids surrounded by hydrogen cloud?
Some comets develop a cloud of hydrogen gas around them when they get close to the sun, due to the sun's radiation breaking apart water molecules in the comet's icy nucleus. This creates a temporary hydrogen cloud known as a coma. Asteroids generally do not have hydrogen clouds since they are composed of rock and metal, lacking the icy material that comets have.
True or false comets are believed to orginate in the oort clouds?
true
Which terrestrial planet is permanently covered in clouds?
Venus is the terrestrial planet that is permanently covered in clouds. Its thick atmosphere is composed mainly of carbon dioxide with clouds of sulfuric acid, which create a dense layer that obscures the planet's surface from view.
Who First Created Water?
nobody, water forms naturally anyplace both hydrogen and oxygen are present. comets are mostly water ice. there are clouds of partially ionized water near stars that glow.
Is asteroids surrounded by hydrogen clouds?
No, asteroids are rocky, metallic bodies that generally do not have atmospheres or hydrogen clouds surrounding them. Hydrogen clouds are more commonly found in gaseous planets like Jupiter or Saturn.
What are huge clouds of helium and hydrogen called?
Vast interstellar clouds of hydrogen are known as "nebula."
What is the surface of jupiter covered with?
clouds
What over is covered with clouds?
air and water
What is the term for swirling clouds of hydrogen gas out of which stars are born?
The term for swirling clouds of hydrogen gas out of which stars are born is "nebula."
What are chunks of rock or dust that form comets?
In the "nebular hypothesis", clouds of gas and dust can lead to the formation of "planetesimals". Some of these become comets. So I think the question refers to "planetesimals".
Are there gas clouds in the Milky Way?
Yes, there are huge clouds of hydrogen gas, called nebulae.
What gas in the atmosphere forms into clouds?
Clouds are water vapor, made from Hydrogen and Oxygen -- H2O.
