MeteoritesSterling Pub., 1993 - 60 من الصفحات "A wonderful resource....Students will be drawn to read and investigate....The text is direct, interesting, and free of mind-numbing chemistry and physics formulas that so often deter YAs from further investigation....An exceptionally well-done summary."-- "SLJ . "Well-written and nicely illustrated....The technical quality of the book is very good...."-- "Science Bks & Films, a starred review . 60 pages (all in color), 8 1/4 x 7 7/8. |
من داخل الكتاب
النتائج 1-3 من 12
الصفحة 49
... cloud " comprising millions of comets . The presence of such a cloud was postulated by the astronomer Jan Oort , so it is known as the " Oort cloud , " in his honor . It must be emphasized that the Oort cloud has not been seen ; its ...
... cloud " comprising millions of comets . The presence of such a cloud was postulated by the astronomer Jan Oort , so it is known as the " Oort cloud , " in his honor . It must be emphasized that the Oort cloud has not been seen ; its ...
الصفحة 52
... cloud of dust and gas in which the Sun formed probably existed more than 4,700 million years ago . At about that time , the plutonium that became incorporated into meteorites was made in an exploding star or supernova within the cloud ...
... cloud of dust and gas in which the Sun formed probably existed more than 4,700 million years ago . At about that time , the plutonium that became incorporated into meteorites was made in an exploding star or supernova within the cloud ...
الصفحة 53
... cloud After a further few million years the Solar System formed , perhaps triggered by the exploding supernova compressing part of the cloud . The first planetary objects possibly formed became hot and melted before the interstellar cloud ...
... cloud After a further few million years the Solar System formed , perhaps triggered by the exploding supernova compressing part of the cloud . The first planetary objects possibly formed became hot and melted before the interstellar cloud ...
المحتوى
Introduction | 1 |
How do meteorites get here? | 8 |
Where do meteorites come from? | 14 |
حقوق النشر | |
3 من الأقسام الأخرى غير ظاهرة
طبعات أخرى - عرض جميع المقتطفات
عبارات ومصطلحات مألوفة
anorthosite Antarctica Apollo astroblemes atmospheric flight basaltic basaltic achondrites basaltic rock blue ice bombardment bright fireball calcium carbonaceous chondrite caused chemical elements chondrites contain chondrules cometary composed cooled core Cosmic spherules crater crystals dark decay feldspar fell formation age fragments fusion crust gravity group IIAB Halley's Comet highlands howardites igneous rocks inches indicates interplanetary dust interstellar cloud iridium iron meteorites iron-nickel metal land on Earth liquid lunar magnesium mare Mars melting mesosiderites Meteor meteorite falls meteorite impact meteorite landed meteorite shower meteoroid micrometeorites million years ago mineral grains molten Moon nebula objects observed occurred olivine orbit palladium Pallasites parent asteroid particles percent nickel planetary planets formed plutonium produced pyroxene radioactive aluminum samples silicate SNC meteorites Solar System solar wind solidified sonic booms space speed stars stone stony material stony meteorite stony minerals Stony-iron meteorite sulfide Sun and planets supernova surface temperature Widmanstätten pattern