Sunrise is the instant at which the upper edge of the Sun appears above the horizon in the east.
Sunrise
The Rayleigh effect, seconds before sunrise in New Zealand
Sunrise, also called sunup in some American English dialects, is the time at which the first part of the Sun appears above the horizon in the east.
Sunrise is the time at which the leading limb of the first rises above the .
Sunrise, 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.
sunrise, sunset: the first (last) appearance of the sun above the horizon each day. Civil ~ occurs when the sun's upper limb appears on the horizon. Note that astronomers define the rising of an object as an altitude of 0°.
Sunrise -- For technical definition, please follow this link to the U.S. Naval Observatory Astronomical Applications website.
Sunrise/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.
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.
Sunrise
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 sunrise 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 sunrise of the year.
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*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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Midnight to sunrise (look for meteors before midnight)
(The Moon's phases are usually chronicled in newspapers; many calendars keep track of them, too.) ...
Planets Around sunrise or sunset Venus Venus Yes Yes Yes No Strong (or extreme) seasons Yes 1930
Rock Yes Thin The Moon Black No None Light No Craters ...
The time from one sunrise 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 sunrise 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 "sunrise." 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 sunrise 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 sunrise. Venus revolves around the sun at a mean distance of c.
At the Viking 1 lander site, the temperature regularly varied from a low near 189 K, just before sunrise, to a high of 240 K in the early afternoon. This temperature swing is much larger than occurs in desert regions on the Earth.
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 sunrise, 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 sunrise 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! ...
On the first morning of the month, Mars will be about 12° up 45 minutes before sunrise, some 4° to the upper left of Venus. Towards the end of June, Mars will pass between the Pleiades cluster and Aldebaran.
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 sunrise 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.
NIGHT, that part of the natural day of twenty-four hours during which the sun is below the horizon, the dark part of the day from sunset to sunrise (see DAY). The word in O. Eng.
This dust originates from comets and from asteroid collisions, and can sometimes be seen with the naked eye as a triangular glow above the horizon just before sunrise or after sunset.
As it does so, it goes from being the 'Evening star', visible after sunset, to being the 'Morning star', visible before sunrise.
The interval of time preceding sunrise and following sunset (see Sunrise; unset) during which the sky is partially illuminated.
The use of 'East' to mean the 'in' direction (actually 'in' → 'East' → 'sunrise' → 'up') may appear unnecessarily contrived.
The planet is called the morning star when it appears in the east at sunrise, and the evening star when it is in the west at sunset. In ancient times the evening star was called Hesperus and the morning star Phosphorus or Lucifer.
It was taken one hour before sunrise on the rover's 63rd martian day, or "sol." The final image is a mosaic of the navigation camera showing a broad view of the sky and the panoramic camera image of Earth.
Some are only seen near the Sun, either around the time of sunrise or sunset (Mercury and Venus are the two that do this - in the animation, the Sun is the yellow dot, Mercury is the red dot, and Venus is the bluish dot.
When the Sun is close to the horizon, such as at Sunrise and Sunset, the light must pass through a much longer path in the atmosphere; more of the blue light is scattered out of this direction, leaving only the red light.
They just swing from the east of the Sun to the west and back, and we can only see them just before sunrise or just after sunset. During the period that we can see them before sunrise, we call them the "morning stars." It lasts for many days.
The line of sunrise or sunset on a planet or its satellite. At dawn and dusk when the sun is lowest in the sky (low sun), topographic features cast their longest shadows.
For example, more than 400,000 people gathered for the Sunrise Event on New Year's Day in Busan City, South Korea. In Brazil, the 2009 Brazilian Olympiad of Astronomy and Astronautics saw more than 750,000 students participate from 32,500 schools.
Cards are convenient at the telescope, easy to stuff in the pocket of your shirt or coat, and easy of light on the sunrise or sunset limb of Mars.
Early in the 20th century, the English astronomer Sir Norman Lockyer demonstrated that the northeast axis aligned with the sunrise at the summer solstice, leading other scholars to speculate that the builders were sun worshipers.
At many locations, surface turbulence follows a diurnal cycle from a minimum just after sunrise, steeply rising to a peak during early afternoon, declining to a secondary minimum shortly after sunset, ...
Sunlight creates sunsets and sunrises that range from quiet and peaceful to colorfully spectacular. It is observed in the blue sky, in rainbows and colored rings, and in peaceful twilights.
A partial transit can be seen in progress at sunrise throughout Europe, western Asia, and eastern Africa. A partial transit can be seen in progress at sunset throughout most of North America, Central America, and western South America.
Here on earth we know it's time for breakfast when the sun comes up, but what does that mean on the International Space Station where astronauts get to see a sunrise every hour and a half? We either have to find solution to this problem.
It will emerge in the morning sky by late March, when it will shine as a bright beacon low in the east shortly before sunrise. As the year progresses, Jupiter will rise earlier and grow brighter, eventually moving into the evening sky.
It refers to the apparent standstill of sunrise and sunset points at midsummer and midwinter. (i) The most southerly and northerly declinations of the Sun. (ii) The date on which the Sun attains its greatest declination.
Mercury is not tidally locked to the Sun, its rotational period of almost 59 days is tidally coupled to its orbital period of 88 days, rotating only one and a half times during each orbit in a 3:2 resonance. Hence, a "day" on Mercury (sunrise to ...
A planet seen in the eastern sky before sunrise, especially Venus
nebula
A hazy mass of gases and particles in space ...
morning star: Any planet visible in the sky just before sunrise.
multiringed basin: Very large impact basins in which there are concentric rings of mountains.
mutant: Offspring born with altered DNA.
Like Mercury, Venus is close to the Sun and so we can only see it before sunrise or after sunset. However, it can appear further above the horizon than Mercury.
Since comets are brightest when near the Sun, they are usually visible only at sunrise or sunset. Charts showing the positions in the sky of some comets can be created with a planetarium program.
More about comets ...
twilight: the time after sunset or before sunrise when the sky is not fully dark.
 See also: Earth, Sun, Time, Sunset, Sky
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