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|Observing the Sun & Anomalies Explained|
|The Solar System|
Free software online to explore the Solar System
More Useful Links: Planet Hunting | Observe the Planets in Realtime | The relative position of the planets in our inner solar system in realtime | Watch the Sun Live | Solar System Live | AuroraMax: Aurora Borealis in Realtime | Ask an Astronomer | Current Positions of Planets
|Observing the Sun|
|Learn about the Sun: Explore|
| "In Sept. of 1859, the entire Earth was engulfed in a gigantic cloud of seething gas, and a blood-red aurora erupted across the planet from the poles to the tropics. Around the world, telegraph systems crashed, machines burst into flames, and electric shocks rendered operators unconscious. Compasses and other sensitive instruments reeled as if struck by a massive magnetic fist. For the first time, people began to suspect that the Earth was not isolated from the rest of the universe... Carrington's observations of a mysterious explosion on the surface of the Sun and how his brilliant insight--that the Sun's magnetism directly influences the Earth." http://www.stuartclark.com/publications/2-publications/4-the-sun-kings
A transit is the astronomical event that occurs when one celestial body appears to move across the face of another celestial body, hiding a small part of it, as seen by an observer at some particular vantage point. If the first celestial body hides a major part, or all of, the second celestial body, then it is an occultation rather than a transit.
A transit occurs when a celestial body crosses the meridian due to the Earth's rotation, about halfway between rising and setting. For instance, the Sun transits the meridian at solar noon . Observation of meridian transits was once very important for timekeeping purposes (see transit instrument ).
The term star transit is used for the passage of a star through the eyepiece of a telescope . Precise observations of elevation or time are carried out to determine star positions or the local vertical ( geographic latitude /longitude)
Known natural objects which can appear between the Earth and the Sun are the Moon (solar eclipse), Mercury (transit of Mercury), Venus (transit of Venus), and some asteroids and comets. Transit of asteroids and comets can only be observed by very large telescopes. For example all attempts to watch the transit of Comet Halley in front of the sun in 1910 failed as result of its small diameter. All such transits can be calculated very well.
List of Transits of Venus: 5 000 BC - 10 000 AD
List of Transits of Mercury on Earth: 5 000 BC - 10 000 AD
List of Lunar Eclipses: BC 5 000 - AD 10 000
List of Solar eclipses during transits: 50 000 BC - 50 000 AD
A Transit of Venus occurs when the planet Venus passes between the Sun and the Earth. (disambigiation)
The next transit of Venus will be:
The transit of Venus across the Sun (PDF)
The transit of Mercury occurs when the planet Mercury passes between the Sun and the Earth.
The next transit of Mercury will be:
Transit visibility from planets superior to the transiting body
|Identify Objects in STEREO Images|
The images are shown in the order of the relative positions of the viewpoints, Behind, Earth, and Ahead. For the Heliospheric Imager (HI) images below, the order is reversed to reflect the fact that the HI Ahead telescopes look to the left of the Sun, and those on Behind look to the right. Also, the HI images are not rotated to put solar north up.
|Recognize Lens flares and Artifacts in Pictures|
Lensflares: when an optical effect occurs inside the optics of a camera creating extra circular orb anomalies
Bokeh: a source of circles around out-of-focus bright points, also due in part to the internals of the lens.
Diffraction spike: a type of lens flare seen in some telescopes
Anti-reflective coating: used to reduce lens flare and produces the red and green colors common in lens flare
Examples of Lensflares: >> More examples
What causes the sun to appear as a black dot when I take a digital photo?
Black Dots on the sun occur when too much light gets into the camera
Examples of over-exposure of light: >>More examples
Sun dogs: A sun dog or sundog is an atmospheric phenomenon that creates bright spots of light in the sky, often on a luminous ring or halo on either side of the sun. Sundogs may appear as a colored patch of light to the left or right of the sun, 22° distant and at the same distance above the horizon as the sun, and in ice halos. They can be seen anywhere in the world during any season, but they are not always obvious or bright. Sundogs are best seen and are most conspicuous when the sun is low.
Examples of Sun dogs: >> More examples
|What is Field Rotation?|
Field rotation is a circular movement of the stars evident in the field of view of your telescope when it is not polar aligned. (celestial object may look tilted)
What is field rotation? How does it affect my scope's viewing and imaging?
Field rotation is the apparent rotation of a celestial object in the field of view of a telescope during the course of the night. All objects in the eyepiece field or on the camera's image will move in arcs. It's usually either ignored or not noticed for visual observations, but cannot be ignored for photography.
It happens when you are using an altazimuth mount or a misaligned equatorial mount. In these cases, all the stars will appear to move around the point or star that is being tracked. Field rotation will occur unless the mount is exactly aligned to counteract the earth's rotation.
Field rotation can be visualized by thinking about what happens when a constellation or the moon rises, transits and sets. From northern latitudes, Orion will rise on his side with his left shoulder (the one north of Rigel) highest. As he crosses the sky he will reach and transit the meridian, when both shoulders will be the same height. When he sets, the right shoulder (Betelgeuse) will appear highest. It's like he's climbed the dome of the sky, reaching the top and then goes down the other side. The angle of his body changes during the course of the night, first tilting to the east, then tilting to the west. Similarly, the moon will rise with the Sea of Crises (Mare Crisium) edge leading upwards, the Ocean of Storms (Oceanus Procellarum) following and lower. Both of these dark areas will appear about the same altitude when it transits, then the Ocean of Storms will be higher than the Sea of Crises as the moon sets. Again the tilt changes as the moon moves across the sky. Both examples show field rotation with your head and body acting like an altazimuth mount.
Because of field rotation, visual directions north, south, west and east will change relative to the top and bottom of the eyepiece during the night. Usually this is not important but you should be aware of it.
On photos, even if tracking on a star is perfect, unless the mount itself is perfectly polar aligned, there will be some degree of field rotation. Only the center will show pinpoint stars or sharp detail. Towards the edge of the field of view, all stars will show arcs concentric with the center. If you are guiding a photograph and using a star off-center or outside the field of view for guiding, then the arcs will be concentric on the guide star.
Because of field rotation, no altazimuth mount is suitable for long-exposure astrophotography. Only a properly polar-aligned equatorial mount will eliminate field rotation.
What is field rotation?
Field Rotation in Altitude over Azimuth Mounts and Its Effect on CCD Imaging - What is the maximum exposure? [PDF]
Motorize your Telescope - Field Rotation
How to process a sequence affected by field rotation
Mathematics of Field Rotation in an Altitude over Azimuth Mount
|Its like the sun comes up and goes down in a different place than usual, how can this be?|
The Earth's Axis has shifted and shortened the day caused by the Chilean Earthquake and the Japan Earthquake, in the following video dr Michio Kaku explains this
NASA about the shift of Earth's Axis after the Chile quake
NASA about the shift of Earth's Axis after the Japan quake
Note: When you check your compass you will see that North now points East.
|Is Venus Unleashing Solar Flares? (Dec 28th, 2011) | Video Link | Nasa Link|
|What NASA has to say about 2012|
Bookofresearch 2011 ©
The Connection Between Solar Activity, Volcanic Eruptions and Earthquakes, Weather, Cycles on Earth and Human Behaviour
What is the Triangle shaped Structure in STEREO Behind HI2 on Dec 29 and 30 2011?
Knowledge and Awareness in Case of Risk, Emergency or Disaster SOS- Tutoring