Rocket Phonics reading books are fully decodable phonics books allowing children to practise their phonic skills in context, developing emerging reading skills. Someone has left the bath tap on and water is dripping through the ceiling! Kim and her family rush around trying to catch the drips and mop up the mess ...all except Grandad who seems very happy to sleep through the chaos! Reading age: 4-5 years
Comet Street Kids reading books follow the adventures of Rav, Asha, Tess and Finn, four of the residents of Comet Street. There are 72 exciting stories in the series that children won't be able to put down. Rav and Finn are playing at Rav's when they hear a noise outside. What is it? A dog? A cat? Will Rav and Finn ever find out? Reading age: 4-5 years
Planetary nebulae are the classic subject of astrophysics. The physical pro- cesses occurring in this highly ionized gaseous medium, the formation of emis- sion lines in clearly specified conditions, the continuous emission extending from the far ultraviolet up to infrared and radio frequencies, the generation of exotic forms of radiation predicted by atomic physics, along with methods for deciphering the observed spectra and detecting physical and kinematic parameters of the radiating medium, etc. - all these problems form the solid foundations of the physical theory of gaseous nebulae. They are an essential part of the arsenal of powerful tools and concepts without which one cannot imagine understanding and interpreting the enormous diversity of processes taking place in the Universe - in gaseous envelopes surrounding the stars of various classes, from cool dwarfs and flare stars up to hot supergiants, as well as in stellar chromospheres and coronae, in atmospheres of unstable and anomalous stars, in circumstellar clouds and gaseous shells born in nova and supernova explosions, in diffuse nebulae and the interstellar medium, in interacting binary systems, in galaxies with emission lines, in quasars, etc. The last thirty years have seen a turning-point in our knowledge concern- ing the very nature of planetary nebulae (PNs). The radio emission of PNs was discovered after it was predicted theoretically. On the other hand, the powerful infrared emission discovered both in the continuum and in emission lines was never expected.
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