Sunspot counts have been the focus of long-term sunspot variability studies since the first proposed solar cycle period by Schwabe ( 1844). We distinguish basically two types of sources: sunspot counts and positional information on sunspots. Note also that the recovery and utilization of historical sunspot records is an ongoing process, and new sources may become available after this review is published. This is why, for example, the first publication about the observations of sunspots by Fabricius ( 1611) will be of marginal importance in this review. Instead, we are compiling actual records of data, particularly of longer duration.
![sun spotter solar telescope sun spotter solar telescope](https://nimax-img.de/Produktbilder/zoom/64573_2/Telescope-solaire-DayStar-Solar-Scout-Sonnenteleskop-80-480-C-OTA-mit-Transportkoffer.jpg)
Different aspects of this history are very important for a better understanding of the observation techniques, the interests of observers or the equipment used, as recently shown by Muñoz-Jaramillo and Vaquero ( 2019). This is not a review of the history of sunspot observations. The recovery of this kind of information from different documentary records preserved mostly in historical libraries and archives around the world is essential for a better understanding of the evolution of our Sun during the last centuries (Vaquero and Vázquez 2009).
![sun spotter solar telescope sun spotter solar telescope](https://nso.edu/wp-content/uploads/2020/12/sunspot-zoom.png)
In general, these observations are the only direct evidence we have left of what really happened in the Sun’s past. However, visitors notice the Sun's projection drifting across the view and will remark on how fast it moves, allowing a great discussion about the rotation of the Earth and the swiftness of both our movement and the apparent movement of the objects in the heavens.Sunspot observations from the past have an enormous importance not only for solar physicists but also for stellar astrophysicists and Earth scientists. Its field of view is wide enough that you don't need to move it constantly.
#SUN SPOTTER SOLAR TELESCOPE MANUAL#
It is a fully manual observing system so there is no automatic "tracking" of the Sun. The Sunspotter’ s largest drawback is also a notable strength. Of course, for solar eclipses the incoming shadow of the Moon is very apparent and easy to observe with a group! Since it uses pieces of paper clipped onto its projection area, visitors can even take turns quickly drawing the disc of the Sun and its spots while in use. The Sunspotter projects a magnified image of the Sun onto a piece of paper, and the image is large and crisp enough that even fairly small sunspots are visible. There is no filter to worry about scratching, no direct line between the Sun and your eyes. "Is it safe?" That's the question always asked when you are observing the Sun, and the Sunspotter is hands down one of the safest solar "telescopes" out there. It’s simple to transport and set up - it even includes a built-in handle, and its own instructions are printed on the side. It is sturdy, striking in appearance, and perfect for use with small groups of all ages. The Sunspotter is one of the handiest astronomy outreach tools I have ever used. NOTE: Promotional codes are not valid on this product. *Customer Service will contact all international shipping customers for a shipping quote.
![sun spotter solar telescope sun spotter solar telescope](https://www.astronomycamp.org/images/sarah_sungun.jpg)
Please note: Overnight and 2-day shipping are not available for this product. Sorry, no delivery to APO/FPO addresses or PO boxes. Caution: Never look directly at the sun without proper protection.