Set of 4: Spiral Nebulas

Front:
Great Spiral Nebula in the Constellation of Andromeda NGC 224, Messier 31 THE NEAREST AND BRIGHTEST OF ALL SPIRAL NEBULAE. THIS SYSTEM OF STARS IS QUITE SIMILAR IN FORM AND STRUCTURE TO OUR OWN STELLAR MILKY WAY SYSTEM. ITS DISTANCE IS ABOUT 1,000,000 LIGHT YEARS. (1 LIGHT YEAR 6 MILLION MILLION MILES.) THE TWO SMALL NEBULAE ARE COMPANIONS OF THE LARGER, THE THREE FORMING A TRIPLE SYSTEM. PHOTOGRAPH FROM 48-INCH SCHMIDT TELESCOPE PC 1 MOUNT WILSON AND PALOMAR OBSERVATORIES E 4695 Spiral Nebula in the Constellation of Ursa Major NGC 3031, Messier 81 THE ARMS IN THIS SPIRAL NEBULA EXTEND FAR OUT FROM THE NUCLEUS. NEAR THE CENTER STARS ARE SO NUMEROUS THAT THEY BLEND TOGETHER AND CAN NOT BE SEPARATED. FARTHER OUT IN THE ARMS MULTITUDES OF STARS BEGIN TO APPEAR AS INDIV4 IDUAL POINTS. ON THE PHOTOGRAPH THEY ARE EXTREMELY FAINT BUT ACTUALLY THEY CORRESPOND IN BRIGHTNESS TO THE BRIGHTER STARS IN OUR OWN STELLAR MILKY WAY SYSTEM. THEY APPEAR FAINT BECAUSE NGC 30 31 IS AT A DISTANCE OF 2.500.000 LIGHT YEARS. (1 LIGHT YEAR 6 MILLION MILLION MILES.) PHOTOGRAPHS FROM 200-INCH HALE TELESCOPE PC 2 MOUNT WILSON AND PALOMAR OBSERVATORIES E 4696 Spiral Nebula in the Constellation of Virgo NGC 459 4 Messier 104 DISTANCE: 8.000.000 LIGHT YEARS. (1 LIGHT YEAR 6 MILLION MILLION MILES.) SEEN NEARLY EDGE- ON. THIS NEBULA IS IN RAPID ROT- ATION. MAKING ONE COMPLETE RE- VOLUTION IN ABOUT 25 MILLION YEARS. THE NARROW DARK LANE IS A STRONG BAND OF DARK MAT- TER BLOTTING OUT THE NEBULOSITY. PHOTOGRAPH FROM 200-INCH HALE TELESCOPE. MOUNT WILSON & PALOMAR OBSERVATORIES. PC 3 E 4697 Spiral Nebula in the Constellation of Canes Venatici NGC 5194, Messier 51 DISTANCE: 3,000,000 LIGHT YEARS. (1 LIGHT YEAR - 6 MILLION MILLION MILES.) THIS OBJECT IS A DOUBLE NEBULA, THE TWO BEING PHYSICALLY CONNECTED. THE BRIGHTER NEBULA IS ONE OF THE VERY FEW WHOSE ARMS CAN BE SEEN IN A TEL- ESCOPE. IT IS FAMOUS AS BEING THE OBJECT IN WHICH SPIRAL STRUCTURE WAS FIRST RECOGNIZED BY LORD ROSSE IN 1845. PC 4 PHOTOGRAPH FROM 200- INCH HALE TELESCOPE MOUNT WILSON AND PALOMAR OBSERVATORIES E 4698

Back:
sill Zochors 42.2/ Blackton Ds Lo Meso C Epif. Bill Zochern 4221 Blacktion so La Do Mesa Calif مدارس الموت الله 4231 Blacklond La Miss Calif siltshorn 4321 Blackton Br Lo Mira Calif.