New Eyes on the Sun: A Guide to Satellite Images and Amateur Observation
Format: PDF / Kindle (mobi) / ePub
Information collected by satellites recently sent by the USA, the European Space Agency, Japan, Germany, the United Kingdom, and Russia to monitor the Sun has changed our knowledge and understanding of the Sun, particularly its effect on Earth. This book presents these findings in a way that will be welcomed by amateur astronomers, students, educators and anyone interested in the Sun. Enhanced by many colour photographs, the book combines newly acquired scientific understanding with detailed descriptions of features visible on the Sun’s surface and in its atmosphere.
In the past, observing the Sun has been left to academics with specialised instruments, since solar observation has been unsafe because of the risk of eye damage. This book explains how amateur astronomers can safely observe the various solar phenomena using special hydrogen-alpha telescopes that are not too expensive. Amateurs can now make a positive contribution to science by monitoring the Sun as professionals do.
Amateurs can also access the solar images taken by satellites via the internet. This book helps readers interpret and understand what these images are showing about the Sun, including the latest 3D images. Solar observers will enjoy comparing their own solar telescope observations with those produced by space probes such as SDO, SOHO, Hinode and STEREO, and further enjoy learning about transits, eclipses, and space weather and how the Sun compares to other stars in the universe.
Observation10.1007/978-3-642-22839-1_5© Springer-Verlag Berlin Heidelberg 2012 5. Eclipses and Transits John Wilkinson1 (1)4 Ross Drive, Castlemaine, Victoria, 3450, Australia John Wilkinson Email: firstname.lastname@example.org Abstract In this chapter we shall examine two different types of astronomical phenomena associated with the Sun. Both these phenomena are observable from Earth and are spectacular in their own right. The first is the solar eclipse, and the second, transits of the Sun. In.
Moon is between the Earth and Sun. At this time the Moon is crossing over the ecliptic (the path the Sun takes across the sky) (Fig. 5.2). Fig. 5.1A solar eclipse occurs when the Moon passes in front of the Sun. The Sun’s bright surface is blocked enabling the corona and chromosphere to be seen in all there glory. As seen from Earth, both the Sun and Moon have approximately the same apparent diameter. As a result, when the Moon passes in front of the Sun it can hide it completely from view. If.
Structure that rises from deep inside the Sun, the scientists found that active regions are made up of many small magnetic structures emerging at adjacent locations. Furthermore, the magnetic structures are replenished by others as they emerge, which makes the active region grow. It is not yet known why a given region on the solar surface can suddenly erupt with magnetic structures and become active, or what causes the active region to be replenished by magnetic “reinforcements”. According to.
Orbit around the Sun. All prior observations had been made at or near the solar system’s ecliptic plane. Its instruments found that the solar wind blows faster at the poles than at the equatorial regions and that the fast wind is the dominant component. In the late 1990s the Ultraviolet Coronal Spectrometer (UVCS) instrument on board the SOHO spacecraft observed the acceleration region of the fast solar wind emanating from the poles of the Sun, and found that the wind accelerates much faster.
The main method used by astronomers to determine the temperature of a star is by the spectroscopic analysis of its light. This method is also used to classify stars and to determine their chemical composition. Spectral types are indicated by the letters OBAFGKM. The hottest stars, O stars, are blue and have surface temperatures over 35,000°C; their spectra is dominated by ionised helium and silicon. Only a few hundred of these stars are known and only three can be seen with the unaided eye:.