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Sunrise

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Sunrise is the instant at which the upper edge of the Sun appears above the horizon in the east.


on the Bay of Rainbows
By Brian Ventrudo
A day or two after the Moon reaches first quarter, sunlight spreads over a striking region on the Moon known as Sinus Iridum, the 'Bay of Rainbows'.

Sunrise is the time at which the leading limb of the first rises above the .

How do and sunset times change with altitude?
Hi, I am a professional airline pilot and an amateur astronomer and would appreciate it if could provide me with a formula or method in how to calculate the affect of altitude on sun set/rise ...

Happy autumnal equinox: here's a year of sunrises
At 09:05 UTC (05:05 Eastern US time) this morning, the position of the center of the Sun's disk, moving south, crossed the celestial equator on the sky.

, Sunset
Who hasn't enjoyed watching a sunset as the Sun's red disk sinks below the horizon. Why does the Sun now appear red?

Sunrise, Sunset: Apparent Motion of the Sun
Objectives:
Identify the Sun as the source of Earth's light.
Observe and describe changes in the Sun's altitude and position.
Recognize that day and night are determined by our view of the Sun.

at the South Pole
Today's autumnal equinox heralds the dawn of a new day at the South Pole as Earth joins three other planets in the solar system where it is autumn in the northern hemisphere.
Just Passing By Earth ...

Sunrise -- For technical definition, please follow this link to the U.S. Naval Observatory Astronomical Applications website.

/Sunset
The times at which the apparent upper limb of the Sun is on the astronomical horizon; i.e.

12 : Sunrise or sunset, as seen from the surface of the Moon, appears to us here on Earth as the Moon's ...
maria.
rays.
Lunar Transient Phenomena (LTP).
terminator.

A Misty Over Olympus Mons
Mars has several other *very* large volcanoes. Some of them are located on top of a big bulge in the side of Mars called the Tharsis Ridge.

Sunrise & Sunset Calendar
Another way of keeping track of the seasons is to watch the sunrise and sunset points on the horizon. The Sun rises and sets at its southernmost point for the year on the day of the Southern solstice.


Noon
The phase diagram seems to show that a solar and lunar eclipse should happen every month but eclipses actually happen only twice a year. You can see why if you look at the Moon's orbit from close to edge-on.

Is sunrise any faster in the tropics--or actually slower--or else, latitude really makes no difference? Explain.

During and sunset, sunlight is attenuated due to Rayleigh scattering and Mie scattering from a particularly long passage through Earth's atmosphere and the direct Sun is sometimes faint enough to be viewed comfortably with the naked eye or ...

Rises at sunrise, transits meridian at noon, sets at sunset
A
Waxing Crescent ...

* Latest of the year.
Click here to return to the calendar page.
*William G. Swan stayed aloft for 30 minutes over Atlantic City, N.J., in a glider powered with 10 small rockets (1931) ...

Sacagawea Sunrise
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Search over 100 encyclopedias and dictionaries: ...

The time from one to the next is called a solar day. The time between successive risings of any given star is one sidereal day.

The exact time of sunrise and sunset (and similar data for moonrise and moonset) may be calculated for any date and 22,000 named cities in the United States, or by specifying the latitude and longitude of any location worldwide, using this program.

The site includes a and sunset time calculator, visibility predictions for the new crescent Moon, maps of forthcoming eclipses and information on UK public holidays.

green flash (NASA SP-7, 1965) A brilliant green coloring of the upper edge of the sun as it appears at sunrise or disappears at sunset when there is a clear, distinct horizon.

But first we need to define "." The World Almanac defines it as the instant the upper limb of the Sun touches the horizon. By this definition we can't see a until the Sun has risen after having been completely below the horizon.

The Babylonians and Hindoos began their day at sunrise, the Athenians and Jews at sunset, the ancient Egyptians and Romans at midnight. -- Day blindness. Med. See Nyctalopia.

Since its greatest elongation (the angle made between the sun, the earth, and Venus) is 47, it can never be seen much longer than 3 hr after sunset or 3 hr before . Venus revolves around the sun at a mean distance of c.

This heliacal rising is the first time in the year when Sirius was seen in the sky just before sunrise. This rising of Sirius (known by the Egyptians as Sothis) signaled the beginning of festivals celebrating fertility and renewal.

nearly an hour before , Perseus will be due east. The Moon, nearly 40 degrees away, should present a minimal problem. Also, low towards the cast are the planets Venus and Mars huddled close together.

(Do we mean a 24 hour period or do we mean the time between sunrise and sunset?) We usually do not have to define it with great quantitative precision to make use of it.

It started to move away just before and once Sun cleared horizon, through a narrow gap between layers of clouds, I noticed Venus immediately as a black disk against deep red, deformed face of our Star! ...

It was three hours before the Martian sunrise when it landed. The probe quickly deflated the air bags, then opened up like a flower - each "petal" being a solar panel to generate power. Four hours later, it broadcast a signal to Earth.

Sometimes, at or sunset, there are flashes of green light visible near the sun. This effect only happens when there are no clouds nearb the sun.

We had stuck something in our arguments to get his attention because, had we maintained the Apollo 8 target for Apollo 10, we would have had a pre-sunrise, quasi-nighttime splashdown. And he'd been nervous about that.

See also: See also: Earth, Astro, Sun, Planet, Sky

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