Atmosphere and ionospher1

Atmosphere and ionospher1 - Atmosphere and ionosphere In...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Atmosphere and ionosphere In 1972, a team of Indian, British and American astronomers working at Indonesia 's Bosscha Observatory claimed that they had detected a thin atmosphere, around the satellite during an occultation , when it and Jupiter passed in front of a star. [53] They estimated that the surface pressure was around 0.1 Pa . [53] However, in 1979 Voyager 1 observed an occultation of a star ( κ Centauri ) during its flyby of the planet, with differing results. [54] The occultation measurements were conducted in the far-ultraviolet spectrum at wavelengths shorter than 200 nm ; they were much more sensitive to the presence of gases than the 1972 measurements in the visible spectrum . No atmosphere was revealed by the Voyager data. The upper limit on the surface particle number density was found to be 1.5 × 10 9 cm −3 , which corresponds to a surface pressure of less than 2.5 µPa. [54]
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/15/2011 for the course AST AST1002 taught by Professor Emilyhoward during the Fall '10 term at Broward College.

Page1 / 2

Atmosphere and ionospher1 - Atmosphere and ionosphere In...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online