Lecture16 - Lecture #16: Venus: Earth's sister planet....

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

View Full Document Right Arrow Icon
Astro 102/104 1 Lecture #16: • Venus: • Earth’s sister planet. • General properties. • Telescopic observations. • Space missions. • Interior, surface, atmosphere. • Readings: – Chapters 7.1(Venus), 9.5, 10.5 Astro 102/104 2 The Main Point Venus is very much like the Earth in terms of its size, density and presumably interior structure. However its surface and atmosphere are very different from Earth’s. Astro 102/104 3 Basic Properties of Venus • Average Distance from Sun: 108,200,000 km (0.72 AU). • Orbital period: 225 days. • Period of Spin around axis: -243 days! • Venus is spinning extremely slowly. • And. ..it's spinning backwards relative to most everything else. .. • Mass: 4.9x10 24 kg = 0.81 M E ; Radius: 6052 km = 0.95 R E . • Density = 5.3 g/cm 3 (recall that Earth ~5.5 g/cm 3 ). • Surface Gravity = 8.9 m/sec 2 (91% of Earth's). • Thick CO 2 -rich atmosphere; Surface pressure ~90x Earth's. • Average Surface Temperature: +482°C (900°F!) • Complex surface geologic processes at work. .. Astro 102/104 4 Observations • Venus is a prominent morning or evening "star", always within ~50° of the Sun. • Venus goes through phases like the Moon, visible in even small telescopes. • Venus is so bright
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 03/04/2008 for the course ASTRO 1102 taught by Professor Squyres,s/margot,j during the Spring '07 term at Cornell University (Engineering School).

Page1 / 4

Lecture16 - Lecture #16: Venus: Earth's sister planet....

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