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.
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
Insolation, Day-Night and Seasons
What is the Earth’s relationships with the Sun and other heavenly bodies?
How do phenomena like day and night, seasonal variations, climatic variations, and certain atmospheric anomalies happen?
Inner planets are made of rocks
and metals – Terrestrial Planets
Outer planets are made of gases
and ices – Gas Giants
Our solar system also includes about 138 satellites (like our moon),
numerous asteroids, as well as comets and meteors (“shooting stars”
and meteorites)[Does our moon have any impact on our environment?]
2. THE SUN AND SOLAR RADIATION
The Sun and Its Energy
Solar Flares (as well as other prominences and coronal mass ejections) occur in the region of sunspots, sending out energized, charged particles at great speeds toward the earth. . .
A Portion of the Electromagnetic Spectrum of Radiant Energy
Earth appears as an oblate
spheroid to the Sun’s
parallel rays; the geoid
Effects of Earth’s Sphericity
3. AXIAL TILT – INCLINATION
and Plane of Ecliptic
Earth’s axis is tilted about 23.5˚ from perpendicular to Plane of Ecliptic;
Earth’s axis remains in a fixed alignment with Polaris directly
overhead, throughout the year, as it revolves about the Sun
The Orbit of the earth is an elliptical path along the Plane of EclipticAverage orbital length = 940,416,480 km
Closest approach to the Sun = 147 million km, Perihelion (January 3)
Farthest distance from the Sun = 152 million km, Aphelion (July 4)
In the Northern Hemisphere,
A: Summer Solstice*
B: Autumnal Equinox
C: Winter Solstice*
D: Vernal Equinox
*During the 2 Solstices,
the situations are reversed in the Southern Hemisphere
Percentage of Insolation
striking various latitudes
during an equinox
The Sun’s Rays in
Summer (b) and Winter (c)