Eclipses What causes an eclipse? How many different types of eclipses are there? Definition An eclipse is an astronomical event that occurs when an astronomical object is temporarily
obscured, either by passing into the shadow of another body or by having another body pass between it and the viewer. An eclipse is a type of syzygy. In astronomy, a syzygy /szdi/ (from the Ancient Greek suzugos () meaning, "yoked ) meaning, "yoked together") is a straight-line configuration of three
celestial bodies in a gravitational system. Above the round domes of La Silla Observatory, three astronomical objects in the Solar System Jupiter (top), Venus (lower left), and Mercury (lower right). This is an astronomical syzygy. Even though the planets are not precisely lined up in an absolute straight line, they are in the same area of space, or quadrant, which classifies as a syzygy. Artists conception of an eclipse
This is not to scale! We only have eclipses during the full and new moon phases. Those are the only times when the Earth , Moon and Sun are lined up and the shadows can fall on each other.
3rd Qu Waning gibbous Waning crescent New
Full Waxing crescent 1st Qu Shadow cones in space
Waxing gibbous Why are shadows of planets and moons in the shape of a cone? At this distance, we are closer to the object so it, and
its shadow, appear bigger. As we get farther away from the object, it appears smaller and consequently its shadow is smaller.
The moons orbit is tilted 5.2 to the ecliptic. This means that we cant have an eclipse every month because the moon is either above or below the ecliptic during the correct phase. The syzygy only
happens once or twice a year. Notice: the tilt doesnt change, the position in orbit changes as the Earth and moon go around the sun. Happens during a new moon. The shadow of the moon falls
on the earth. SOLAR ECLIPSE Solar Eclipse What does an eclipse look like?
Partial eclipses Total Eclipse with the *corona visible *Corona- Spanish for crown. The suns rays look like a crown
The difference between a total eclipse, a partial eclipse and an annular eclipse. When the moon is farther away from us we get an annular eclipse because the moon appears smaller, so it doesnt cover the whole
sun. Area of totality A picture of a Solar eclipse from space. This is the moons shadow on the earth
Area of partiality Area of totality Total Solar Eclipse Notice the flares and prominences in red. The corona is in white. The corona of the sun is not visible to the scientists unless we have a total solar eclipse.
Sun Spots Prominence Jupiter Earth
Solar Prominence The planets are represented in a true scale size compared to the sun. Solar Flares These flares send electromagnetic energy into space that can reach Earth and even the outer planets. This energy causes auroras and disturbances in radio signals.
Aurora Borealis When the suns energy interacts with the earths magnetic field at the poles, these beautiful lights appear in the sky. Annular solar eclipse Notice that the corona is not visible in this picture. There is still a ring of the suns disk that is visible and very bright. Even with the majority of the sun obscured, the amount of sun that is visible can do permanent damage to your eyes.
Partial Solar Eclipse Partial Solar Eclipse This was taken with special filters. Lunar Eclipse
When the moon moves into the shadow of the earth during a full moon phase. Because of the reddish color of the moon, sometimes this eclipse is called a Blood Moon From Simi Valley, California, December 2011's totally eclipsed Moon hung just a few
degrees above the western horizon. The southern half (lower left) of the disk, nearest the umbra's outer edge, is relatively bright. Sky & Telescope / J.
Kelly Beatty From the Moon's perspective, the Sun remains completely hidden behind Earth for 59 minutes. From Earth's perspective, the lunar disk isn't completely blacked out but instead remains dimly lit by a deep orange or red glow. That's because Earth's atmosphere scatters and refracts (bends) sunlight that grazes the rim of our globe, and some of this light continues on toward the Moon. For an astronaut standing on the Moon during a total lunar eclipse, the situation would be obvious. The edge of
the Earth would shine brilliant orange-red with the light of all the world's sunrises and sunsets happening at the time, and this light would be bright enough to cast a dim red glow on the lunar landscape at the astronaut's feet. View from space View from Earth
Different lunar eclipses Total Solar Eclipse- all of the sun is covered by the moon Partial Solar Eclipse-the whole sun is NOT covered up, portions are
visible. Total Lunar Eclipse-The whole moon is in the Earths shadow Partial Lunar Eclipse-Only part of the moon is in the Earths shadow Annular Solar Eclipse- The moon is too far away from the Earth so it
appears smaller and doesnt completely cover the sun. We see a bright ring of the sun. No corona is visible. Finish your notes!
Color coding Write a summary Write a response You will a have an activity that you will need to use your notes! Be sure you have good notes
These indirect indicators are: treatment demand; drug-related deaths, drug-law offences and heroin seizures. I will now briefly review these indicators. Another indirect indicator of our heroin problem is the number of drug-law offences for heroin use or trafficking (the yellow...
About Me . Davidson Graduate many years ago (Mascot) Taught Middle School ESL in Japan, Middle School ESL in Korea, Middle School Japanese in Winson-Salem, High School Math in Mexico, Middle School Math in Brazil, and High School Science in...
The Chinese University of Hong Kong Some Useful Information Lecturer: Prof. Ronald Lui Email: [email protected] Tel: 3943-7975 Office: Lady Shaw Building (LSB) 207 Lecture time (?): ... [Free access of online version on CUHK library] Fundamentals of Digital Image Processing:...
Closed Simple (curve does not intersect itself) Plane figure (2 dimensional) Made up of three or more line segments No dangling parts Examples Rectangle Triangle Pentagon Hexagon Trapezoid Nonexamples Circle Cone Arrow (Ray) Cube Letter A Frayer Model (Teaching Reading...
Who sewed the first American flag? How many US States are there? When was Independence Day declared a legal holiday? a U.S. History Pop Quiz. What was the primary reason the pilgrims came to America? What is the title of...
The SMHS medical necessity determination is based on an assessment of the beneficiary by the MHP. If medical necessity criteria for Medi-Cal SMHS are not met, the MHP will refer the beneficiary back to the MCP for mental health services...
Rather, measurement of each of the strong and weak ions that influence water dissociation, although cumbersome, is essential. Carbon Dioxide-Bicarbonate (Boston) Approach First, the approach is not as simple as it seems, requiring the clinician to refer to confusing maps...
Ready to download the document? Go ahead and hit continue!