Extra Solar Planets. The first—51 Pegasi b ( Bellerophon ). The star. The planet. 51 Pegasi B. Star 51 Pegasi Constellation Pegasus Distance 50.9 ± 0.3 ly (15.61 ± 0.09 pc ) Spectral type G2.5IVa or G4-5Va Mass ( m )1.06 x Mass of Sun Radius ( r )1.237 ± 0.047 RsunBy asa
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Earth-Sun Relationships. The Reasons for the Seasons. Tilt of the earth on its axis. The earth is tilted 23.5º from perpendicular to the plane of the ecliptic. Tilt is currently constantly toward Polaris. Why is it hot in the tropics and cold at the poles?.
Earth-Sun Relationships. The Reasons for the Seasons. Solar Radiation. The earth intercepts less than one two-billionth of the energy given off by the sun. However, the radiation is sufficient to provide 99.9% of the energy that heats the earth / drives our climate. Radiation Receipt.
Earth-Sun Relationships. Earth’s Orientation. • Revolution – seasonal changes occur because Earth’s position relative to the sun continually changes as it travels along its orbit .
Earth-Sun Relationships. Review. Fig 3.6 Arbogast. How many degrees in a time zone? 10 15 24 360. Significance of Earth’s rotation. Image source: http://pearlofportland.blogspot.com. Significance of Earth-Sun geometry. Image source: Omnis, Inc. (www.omnisinc.com). Earth-Sun Geometry.
Earth-Sun Relationships. Insolation, Day-Night and Seasons. Cosmic Connections: Earth, Solar System and Beyond 2. The Sun and Solar Radiation: Insolation , Solar Energy Inclinations and Movements of Earth: Day-Night, Length of Day, Seasons, Latitudinal Zones.
Earth-Sun Relationships. The Reasons for the Seasons. Why is it hot in the tropics and cold at the poles?. The Earth is curved and this causes differing angles of incidence.
Earth, Moon, Sun. Chapter 7. Earth in Space. Chapter 7, Section 1. Earth’s size and shape. Earth is a sphere How do we know? No matter where you are on Earth, gravity causes all objects to fall toward the center of the Earth
Sun Earth Connection s. Sun-Earth Connection. Space Station. High Altitude Air Flight. Human Exploration of Space. Exploring Beyond Earth. Scientific Understanding. GPS & HF, VHF Radio com. Global Change. Electric Power Grids. Enabling Science. Education/ Outreach.
Earth-Sun-Moon. Gravity’s Influence on Orbits. 22.2 The Earth–Moon–Sun System . Rotation. • Rotation is the turning, or spinning, of a body on its axis. • Two measurements for rotation:. 1. Mean solar day is the time interval from one noon to the next, about 24 hours.
How do they work together to help life survive? The Planets. Sun, Moon, Earth,. What is a planet?. According to the IAU (International Astronomical Union) a planet must meet these three guidelines. What is a planet?.