Astronomy

Download 101 Fun Facts on Astronomy by Kevin Manning PDF

By Kevin Manning

Astronomy is the main fascinating and enjoyable subject within the universe. in fact, i'm a piece biased, yet don't you compromise? utilizing a telescope to work out the invisible and glance a long way again in time, exploring the universe to profit approximately meteors, the Moon, comets, asteroids, megastar clusters, nebulae and galaxies, and attempting to comprehend the position of black holes, darkish subject, and darkish strength, are all coated during this stress-free textual content.

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Extra resources for 101 Fun Facts on Astronomy

Sample text

They are long thin jets of luminous gas, projecting upwards from the photosphere. Spicules rise to the top of the chromosphere at about 72,000 km/h and then sink back down again over the course of about 10 min (see Fig. 10). The chromosphere also contains fibrils which are dark protrusions or horizontal wisps of gas similar to spicules but with about twice the duration. Another feature is the prominences, which are gigantic plumes of gas rising up through the chromosphere from the photosphere. They are suspended above the photosphere by magnetic fields and can reach heights of up to 150,000 km.

Doppler images of the solar surface show the presence of transverse waves – something that is unique to the condensed state. In the liquid model, the chromosphere represents that region where matter projected into the corona is in the process of recondensing in order to enter the liquid state of the photosphere. The presence of superheated liquids within the solar interior can easily explain the production of solar eruptions and the appearance Warming to the Sun 31 that the surface is boiling. It is also well known that the Sun has strong magnetic fields – on Earth such fields are always produced by condensed matter.

The x-ray telescope also photographs the Sun faster and with better resolution and greater sensitivity than previous grazing-incidence x-ray instruments. The Hinode solar optical telescope was the first to be able to measure small changes in the Sun’s magnetic field. The data collected will be used to study how these changes evolve and coincide with dynamic events seen in the corona. The EUV imaging spectrometer has been designed to measure the flow velocity or speed of solar particles, and diagnose the temperature and density of solar plasma.

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