TABLE: The Constellations . ... The Hunting Dogs . ... But the stars that make up Orion lie at very different distances from the Sun. ... String . ... Tape or glue the string to the top of the cardboard so that the "star" will not move. ... Name of Star . ... Other Constellation Activities Given a star chart without constellation figures marked on it (whether real star charts or made-up star patterns), students can invent their own constellations, looking for patterns in the stars that appeal to them. ...

Next: INTRODUCTION . ... The R Coronae Borealis stars (RCB) stars are one of the longest known classes of variable star. ... This spectacular fading is caused by the formation of sooty dust clouds above the surface of the star. The surfaces of RCB stars are unusually poor in hydrogen, and rich in carbon and nitrogen, which implies that they are the remnants of evolved stars. ... However, many questions remian regarding their evolutionary origin and the physical mechanism of dust formation. ...

Mapa del Sitio . Corona solar . ... Las estructuras visibles en la corona en esos momentos sugieren que est n configuradas por campos magn ticos y, por lo tanto, que la corona est constituida por plasma. Por ejemplo, los cortos "penachos" que se elevan desde las regiones polares del Sol tienen la apariencia de la l neas de campo saliendo de una barra imantada, que sugieren que el Sol tiene, adem s de los intensos campos de las manchas, un campo magn tico global como el de la Tierra. ...

The Sun's corona . ... For instance, short "plumes" rising from the polar regions of the Sun look very much like field lines coming out of the end of a bar magnet, and they therefore suggest that the Sun, in addition to the intense fields of sunspots, also has a global magnetic field like the Earth's. Arches above the . Sun's surface . ... It is brightest near sunspots, whose arched field lines apparently hamper the outflow of solar wind which carries away energy and helps cool the corona. ...