International Space Station



International Space Station

March 2009 spacewalk by shuttle astronaut Joseph Acaba with Discovery and Kibo in the background.

टिप्पणियाँ

एक टिप्पणी भेजें

इस ब्लॉग से लोकप्रिय पोस्ट

आकाशगङ्गा

चित्र
आकाशगङ्गा एक तारापुञ्ज हो जहाँ हाम्रो सौर्यमण्डल (पृथ्वी समेत) रहेको छ। यो एक सङ्खाकार (स्पाइरल) तारापुञ्ज हो। यसको मुख्य चक्काको व्यास करिव ८०,००० देखि १ लाख प्रकाशवर्ष छ भने परिधि २,५०,००० देखि ३,००,००० प्रकाशवर्ष छ। ब्रम्हाण्ड मा अबलोकन गर्न सकिने अरबौं तारापुञ्जहरू मध्येको एक हो आकाशगङ्गा। (Coma Berenicesतारापुञ्जमा रहेको NGC 4414 नामको चक्राकार आकाशगंगा, यसको व्यास करिब ५५,००० प्रकाशवर्षरहेको अनुमान गरिएको यो तारापुञ्ज करिब ६०,००,००,००० प्रकाशवर्ष टाढा रहेको छ|) इतिहास= आकाशगङ्गाको आयु ठम्याउन निक्कै कठिन छ, तापनि यस पुञ्जको सबै भन्दा पुरानो ताराको आयु अन्दाजि करिव १३.६ अर्ब वर्ष छ जुन लगभग यस तारापुञ्जकै आयु समान छ। तारापुञ्ज गर्भ Main article: तारापुञ्ज गर्भ धनुराशि तिरको पुञ्जगर्भ। धनु (राशि)का मुख्य ताराहरू रातो देखाईएका छन तारापुञ्जिय चक्का, जुन गर्भबाट बाहिरतिर उठेको छ, को व्यास करिब ७० हजार देखि एक लाख प्रकाशवर्ष लामो छ।  सूर्य देखि पुञ्जगर्भ सम्मेको दुरी करिव २६,००० ± १४०० प्रकाशवर्ष लामो रहेको अनुमान छ। तारापुञ्जको गर्भमा ध...
और पढ़ें
Hotel Good Quality Hall and Dining Room Wooden Folding Doors SoundproofRoomDividers, is located in Guangzhou, China (hereinafter called our company) is a professional manufacturer of  sound proof room dividers  and folding soundproof room dividers. Our business philosophy is to provide our customers with more and better equipment with easily and stable operation, by our continuously research, development and renovation. Hotel Gooden Quality Hall and Dining Room Wood Foldable Door 1.Made from Recycled raw materials 2.Excellent sound absorption 3.Test Reports available on request 4.Fireproof finish available The new series of machine and equipments feature high efficiency, advanced technology, stable capability and wide applicability. To become the preferred supplier of  hanging room divider  and soundproof room divider products to businesses and end users, by combining tried-and-trusted methods with innovative and progressive ideas, we always trying to generate c...
और पढ़ें

Billions and Billions of Planets

चित्र
Look up at the night sky and you'll see stars, sure. But the sky is also filled with planets -- billions and billions of them at least. That's the conclusion of a new study by astronomers at the California Institute of Technology in Pasadena, which provides yet more evidence that planetary systems are the cosmic norm. The team made their estimate while analyzing planets orbiting a star called Kepler-32 -- planets that are representative, they say, of the vast majority of planets in our galaxy and thus serve as a perfect case study for understanding how most of these worlds form. "There are at least 100 billion planets in the galaxy, just our galaxy," says John Johnson, assistant professor of planetary astronomy at Caltech and coauthor of the study, which was recently accepted for publication in the Astrophysical Journal. "That's mind-boggling." "It's a staggering number, if you think about it," adds Jonathan Swift, a postdoctoral student a...
और पढ़ें