An eclipse occurs when one celestial body passes between the sun and another, blocking sunlight or moonlight. There are two main types of eclipses - lunar eclipses, where the moon passes into Earth's shadow, and solar eclipses, where the moon passes between Earth and the sun. During a lunar eclipse, the moon turns red as it is illuminated only by sunlight passing through Earth's atmosphere. A solar eclipse can be partial or total, where the moon completely blocks the sun's light over a small area. Total solar eclipses are rare as the moon's shadow is small and its orbit is tilted relative to Earth's.
A "lunar eclipse" and a "solar eclipse" refer to events involving three celestial bodies: the Sun ("solar"), the moon ("lunar"), and the Earth. A lunar eclipse occurs when the Earth passes between the Moon and the Sun, and the Earth's shadow obscures the moon or a portion of it. A solar eclipse occurs when the Moon passes between the Earth and the Sun, blocking all or a portion of the Sun.
A "lunar eclipse" and a "solar eclipse" refer to events involving three celestial bodies: the Sun ("solar"), the moon ("lunar"), and the Earth. A lunar eclipse occurs when the Earth passes between the Moon and the Sun, and the Earth's shadow obscures the moon or a portion of it. A solar eclipse occurs when the Moon passes between the Earth and the Sun, blocking all or a portion of the Sun.
Cassandra Summit 2015 - A Change of SeasonsEiti Kimura
A CHANGE OF SEASONS: A big move to Apache Cassandra!
This is an extended version of the material presented at Cassandra Summit 2015 - Santa Clara - California - USA.
In this presentation I will show you 3 moves, use cases, that constitute our Big Move to Apache Cassandra @Movile.
Walking through relational model to NoSQL solution, hybrid platforms and a staggering cost reduction and throughput increase.
Moon Phases:
The moon's phases refer to the different appearances of the moon as observed from Earth during its orbit around our planet. These phases are primarily determined by the relative positions of the Earth, the moon, and the sun. As the moon orbits the Earth, different portions of its surface are illuminated by sunlight, resulting in the various phases we observe.
1. New Moon:
The new moon occurs when the moon is positioned between the Earth and the sun, with its illuminated side facing away from Earth. From our perspective, the moon appears dark and invisible in the night sky. This marks the beginning of a new lunar cycle.
2. Waxing Crescent:
Following the new moon, a small sliver of the moon becomes visible as sunlight gradually illuminates its surface. This phase is known as the waxing crescent. It appears as a thin crescent shape in the western sky after sunset.
3. First Quarter:
During the first quarter phase, the moon has completed approximately one-quarter of its orbit around the Earth. Half of the moon's surface is illuminated by sunlight, creating a half-moon shape. This phase is often referred to as the waxing half or the half moon.
4. Waxing Gibbous:
As the moon continues to orbit, more of its surface becomes illuminated by sunlight. The waxing gibbous phase occurs when the illuminated portion of the moon is greater than half but not yet full. It appears as a bulging, almost full moon in the night sky.
5. Full Moon:
The full moon occurs when the Earth is positioned directly between the sun and the moon, with the moon's entire illuminated side facing Earth. This phase marks the midpoint of the lunar cycle and is characterized by a fully illuminated, round shape. The full moon is often associated with cultural and religious significance and is the brightest phase of the lunar cycle.
6. Waning Gibbous:
Following the full moon, the moon begins to wane or decrease in illumination. The waning gibbous phase occurs when the illuminated portion of the moon is greater than half but gradually diminishing. It appears as a shrinking, nearly full moon in the night sky.
7. Third Quarter:
During the third quarter phase, the moon has completed approximately three-quarters of its orbit around the Earth. Half of the moon's surface is illuminated, but this time, the opposite half compared to the first quarter phase. It is often referred to as the waning half or the half moon.
8. Waning Crescent:
The waning crescent phase marks the final stage of the lunar cycle before the new moon. Only a small portion of the moon's surface is illuminated by sunlight, appearing as a thin crescent shape in the eastern sky before sunrise. This phase gradually transitions into the new moon, completing the lunar cycle.
These phases repeat in a continuous cycle, with each complete cycle lasting approximately 29.5 days, known as a synodic month. The moon's phases have significant cultural, religious, and scientific importance,
2. Celestial bodies in space such as the moon and Earth cast shadows. They casts shadow because the are opaque bodies. Earth and the moon cast conelike shadows. This occurrence is observed from the Earth as an Eclipse .
3. Why Are There Eclipses? Both the moon and the Earth do not produce their own light. They borrow their light from the sun. Being both opaque, they do not allow light to pass through.
4. When the moon, the earth, and the sun are in one straight line, shadow may fall on either the moon or the Earth. An eclipse occurs when a celestial body blocks light from reaching another celestial body.
6. Lunar Eclipse During the full moon, the Earth is between the sun and the moon. When the sun shines on the side of the Earth, the light does not pass through. The shadow of the Earth is formed. The Earth’s shadow may fall on the face of the moon.
7. When the face of the moon is covered with the Earth’s shadow, the moon cannot reflect the sun’s light. It will be dark even during full moon. This is Lunar Eclipse. A lunar eclipse may be partial or total.
9. If the moon is in the dark part of Earth’s shadow (umbra), there is a total lunar eclipse . If it is in the light part of the shadow (penumbra) there is a partial lunar eclipse . A total lunar eclipse can last for more than an hour
10. Solar Eclipse During the new moon, the moon is between the sun and the Earth. The moon passes over the same place twice a day, one at night one during the day, because the Earth rotate.
11. If the moon passes over the Earth as the sun shines on one side of the Earth, the moon blocs the sunlight and a shadow of the moon is formed. This shadow falls on the surface of the Earth. The part of the earth that receives this shadow of the moon will be darkened. The people will experience darkness (like night) even during daytime. This is called solar eclipse.
13. Total Solar Eclipse During a solar eclipse, the moon moves between the sun and the earth. The light from the outer part of the sun’s atmosphere, called the corona, became visible during a total solar eclipse on July 11, 1991, in La Paz, Baja California, Mexico. The moon’s shadow on earth appeared only as a thin band not more than 269 km (167 mi) wide.
14. During a solar eclipse, the moon casts shadow of the earth, with a dark region called umbra and the lighter region called penumbra. If the Earth is inside the umbra, Earth experience a total solar eclipse. If the earth is inside the penumbra, it will experience only a partial solar eclipse.
15.
16. An annular eclipse occurs when the tip o the umbra does not reach the earth. You can only see a bright ring around the sun, which is called an annulus . This only happens in an eclipse of the sun, never in an eclipse of the moon.
17.
18. Why a Total Solar Eclipse Seldom Happens? There are two reasons for this. First, the moon’s orbit is tilted five degrees to Earth’s orbit. Second, the moon is so small that its dark shadow can barely touch the earth’s surface.
19. During a total solar eclipse, a small place can be totally dark, like nighttime. The longest may be seven and a half minutes. But this darkness is confined only to a small place, the place where the dark shadow if the moon falls. The other places are bright and sunny.
