Satellite constellations: Astronomers warn of threat to view of Universe

Astronomers are warning that their view of the Universe could be under threat. From next week, a campaign to launch thousands of new sate...

Astronomers are warning that their view of the Universe could be under threat.

From next week, a campaign to launch thousands of new satellites will begin in earnest, offering high-speed internet access from space.


But the first fleets of these spacecraft, which have already been sent into orbit by US company SpaceX, are affecting images of the night sky.
They are appearing as bright white streaks, so dazzling that they are competing with the stars.
Scientists are worried that future "mega-constellations" of satellites could obscure images from optical telescopes and interfere with radio astronomy observations.
Dr Dave Clements, an astrophysicist from Imperial College London, told BBC News: "The night sky is a commons - and what we have here is a tragedy of the commons."
The companies involved said they were working with astronomers to minimise the impact of the satellites.
Why are so many satellites being launched?
It's all about high-speed internet access.
Instead of being constrained by wires and cables, satellites can beam internet access down to the ground from space.
And if you have lots of them in orbit, it means even the most remote regions can get connectivity.
To give you an idea of the numbers, there are currently just 2,200 active satellites flying around the Earth.
But as of next week, the Starlink constellation - a project by US company SpaceX - will start sending batches of 60 satellites into orbit every few weeks. This will mean about 1,500 satellites have been launched by the end of next year, and by the mid-2020s there could be a fleet of 12,000.
UK company OneWeb are aiming for about 650 satellites - but this could rise to 2,000 if there is enough customer demand.
While Amazon have a constellation of 3,200 spacecraft planned.
Why are astronomers worried?

In May and November, Starlink sent 120 satellites into orbits below 500km.
But stargazers were concerned when the spacecraft appeared as bright white flashes on their images.

Gemini observatory images of Starlink satellitesImage copyrightGEMINI OBSERVATORY/ NSF
Image captionThe Gemini Observatory recorded a trail of Starlink satellites

Dhara Patel, an astronomer at the Royal Observatory Greenwich said: "These satellites are about the size of a table, but they're very reflective, and their panels reflect lots of the Sun's light, which means that we can see them in images that we take with telescopes.
"These satellites are also big radiowave users… and that means they can interfere with the signals that astronomers using. So it also affects radio astronomy as well."
She warns that problem will grow as the numbers of satellites in orbit increase.
What could this mean for research?
Dr Clements believes the satellites could have a real impact on observations.
"They present a foreground between what we're observing from the Earth and the rest of the Universe. So they get in the way of everything.
"And you'll miss whatever is behind them, whether that's a nearby potentially hazardous asteroid or the most distant Quasar in the Universe."
He said it would be particularly troublesome for telescopes taking large surveys of the sky, such as the future Large Synoptic Survey Telescope (LSST) in Chile.
He explained: "What we want to do with LSST and other telescopes is to make a real-time motion picture of how the sky is changing...
"Now we have these satellites that interrupt observations, and it's like someone's walking around firing a flashbulb every now and again."
But Prof Martin Barstow, an astrophysicist from the University of Leicester said some of the problems could be fixed.
"The numbers of satellites do sound frightening, but actually space is big - so when you superimpose them all on the sky, the density of these things is not going to be very large," he said.
"And because the satellites have known positions, you can mitigate. A satellite is going to be a dot in an image and it might appear as a transient burst of light - but you will know about it and can remove it from the image.
"It will cost effort and work for observatories to deal with it, but it can be done."
For radioastronomy, however, the constellations could pose more of an issue - especially for relatively new telescopes, such as the Square Kilometre Array (SKA).
The radio signals the satellites use will be different from the ones astronomers are looking for, but they could still interfere, said Prof Barstow.
In May and November, Starlink sent 120 satellites into orbits below 500km.
But stargazers were concerned when the spacecraft appeared as bright white flashes on their images.



What do the companies involved say?

SpaceX told the BBC that they were actively working with international astronomers to minimise the impact of the Starlink satellites.

For their next launch, they are trialling a special coating that is designed to make the spacecraft less bright to see if this will help.
OneWeb said they wanted to be a "thought leader in responsible space" and were putting their satellites into an orbit of 1,200km so they would not interfere with astronomical observations.
Ruth Pritchard-Kelly, vice president of OneWeb, said: "We chose an orbit as part of our dedication to responsible use of outer space… And we've also talked to the astronomy community before we launched to make sure that that our satellites won't be too reflective, and that there won't be radio interference with their radio astronomy."
She added that it shouldn't be a case of having to choose between connectivity and astronomy.
"There is no question that the entire world is entitled to be connected to the internet…. So it's going to happen. And probably three or four of these systems are going to happen," she said.
"And the question will be working with the other stakeholders to make sure that we're not interfering with them, whether they are existing satellite technologies, or the mobile phone on the ground, or the astronomy community.
"We know we're going to work it out with everybody."
Stargazers will be watching the skies to see if a compromise can be found.
Pl Note :Soon this article will appear in Hindi too ,give me little time .
Virendra Sharma, F/0
Cdr Nishant Sharma,245/2,Vikram Vihar ,Shankar Vihar Coplex ,
Delhi -Cantt 110 010 
85 88 98 7150 

COMMENTS

Name

- दर्शन लाल बावेजा,1,- बी एस पाबला,1,-Dr. Prashant Arya,2,-अंकित,4,-अंकुर गुप्ता,7,-अभिषेक ओझा,2,-अल्पना वर्मा,22,-आशीष श्रीवास्‍तव,2,-इन्द्रनील भट्टाचार्जी,3,-काव्या शुक्ला,2,-जाकिर अली ‘रजनीश’,56,-जी.के. अवधिया,6,-जीशान हैदर जैदी,45,-डा प्रवीण चोपड़ा,4,-डा0 अरविंद मिश्र,26,-डा0 श्‍याम गुप्‍ता,5,-डॉ. गुरू दयाल प्रदीप,8,-डॉ0 दिनेश मिश्र,5,-दर्शन बवेजा,1,-दर्शन लाल बवेजा,7,-दर्शन लाल बावेजा,2,-दिनेशराय द्विवेदी,1,-पवन मिश्रा,1,-पूनम मिश्रा,7,-बालसुब्रमण्यम,2,-योगेन्द्र पाल,6,-रंजना [रंजू भाटिया],22,-रेखा श्रीवास्‍तव,1,-लवली कुमारी,3,-विनय प्रजापति,2,-वीरेंद्र शर्मा(वीरुभाई),81,-शिरीष खरे,2,-शैलेश भारतवासी,1,-संदीप,2,-सलीम ख़ान,13,-हिमांशु पाण्डेय,3,.संस्‍था के उद्देश्‍य,1,।NASA,1,(गंगा दशहरा),1,100 billion planets,1,2011 एम डी,1,22 जुलाई,1,22/7,1,3/14,1,3D FANTASY GAME SPARX,1,3D News Paper,2,5 जून,1,Acid rain,1,Adhik maas,1,Adolescent,1,Aids Bumb,1,aids killing cream,1,Albert von Szent-Györgyi de Nagyrápolt,1,Alfred Nobel,1,aliens,1,All india raduio,1,altruism,1,AM,18,Aml Versha,1,andhvishwas,5,animal behaviour,1,animals,1,Antarctic Bottom Water,1,Antarctica,9,anti aids cream,1,Antibiotic resistance,1,arunachal pradesh,1,astrological challenge,1,astrology,1,Astrology and Blind Faith,1,astrology and science,1,astrology challenge,1,astronomy,4,Aubrey Holes,1,Award,4,AWI,1,Ayush Kumar Mittal,1,bad effects of mobile,1,beat Cancer,1,Beauty in Mathematics,1,Benefit of Mother Milk,1,benifit of yoga,1,Bhaddari,1,Bhoot Pret,3,big bang theory,1,Binge Drinking,1,Bio Cremation,1,bionic eye Veerubhai,1,Blind Faith,4,Blind Faith and Learned person,1,bloggers achievements,1,Blood donation,1,bloom box energy generator,1,Bobs Award,1,Breath of mud,1,briny water,1,Bullock Power,1,Business Continuity,1,C Programming Language,1,calendar,1,Camel reproduction centre,1,Carbon Sink,1,Cause of Acne,1,Change Lifestyle,1,childhood and TV,1,chromosome,1,Cognitive Scinece,1,comets,1,Computer,2,darshan baweja,1,Deep Ocean Currents,1,Depression Treatment,1,desert process,1,Dineshrai Dwivedi,1,DISQUS,1,DNA,3,DNA Fingerprinting,1,Dr Shivedra Shukla,1,Dr. Abdul Kalam,1,Dr. K. N. Pandey,1,Dr. shyam gupta,1,Dr.G.D.Pradeep,9,Drug resistance,1,earth,28,Earthquake,5,Einstein,1,energy,1,Equinox,1,eve donation,1,Experiments,1,Facebook Causes Eating Disorders,1,faith healing and science,1,fastest computer,1,fibonacci,1,Film colourization Technique,1,Food Poisoning,1,formers societe,1,gauraiya,1,Genetics Laboratory,1,Ghagh,1,gigsflops,1,God And Science,1,golden number,2,golden ratio,2,guest article,9,guinea pig,1,Have eggs to stay alert at work,1,Health,70,Health and Food,14,Health and Fruits,1,Heart Attack,1,Heel Stone,1,Hindi Children's Science Fiction,1,HIV Aids,1,Human Induced Seismicity,1,Hydrogen Power,1,hyzine,1,hyzinomania,1,identification technology,2,IIT,2,Illusion,2,immortality,2,indian astronomy,1,influenza A (H1N1) virus,1,Innovative Physics,1,ins arihant,1,Instant Hip Hain Relief,1,International Conference,1,International Year of Biodiversity,1,invention,5,inventions,30,ISC,2,Izhar Asar,1,Jafar Al Sadiq,1,Jansatta,1,japan tsunami nature culture,1,Kshaya maas,1,Laboratory,1,Ladies Health,5,Lauh Stambh,1,leap year,1,Lejend Films,1,linux,1,Man vs.Machine,1,Manish Mohan Gore,1,Manjeet Singh Boparai,1,MARS CLIMATE,1,Mary Query,2,math,1,Medical Science,2,Memory,1,Metallurgy,1,Meteor and Meteorite,1,Microbe Power,1,Miracle,1,Misconduct,3,Mission Stardust-NExT,1,MK,71,Molecular Biology,2,Motive of Science Bloggers Association,1,Mystery,1,Nature,1,Nature experts Animal and Birds,1,Negative Effects of Night Shift,1,Neuroscience Research,1,new technology,1,NKG,4,open source software,1,Osmosis,1,Otizm,1,Pahli Barsat,1,pain killer and pain,1,para manovigyan,1,PCST 2010,5,pencil,1,Physics for Entertainment,1,PK,2,Plagiarism,5,Prey(Novel) by Michael Crichton,1,Pshychology,1,psychological therapy in vedic literature,1,Puberty,1,Rainbow,1,reason of brininess,1,Refinement,1,Research,4,Robotics,1,Safe Blogging,1,Science Bloggers Association as a NGO,2,Science communication,1,science communication through blog writing,4,Science Fiction,16,Science Fiction Writing in Regional Languages,1,Science Joks,1,Science Journalism and Ethics,3,Science News,2,science of laughter,1,science project,1,Science Reporter,1,Science Theories,9,scientific inventions,2,Scientist,47,scientists,1,Search Engine Volunia,1,Secret of invisibility,1,Sex Ratio,1,Shinya Yamanaka,1,SI,1,siddhi,1,Solar Energy,1,space tourism,1,space travel,1,Spirituality,1,Stem Cell,1,Stephen Hawking,1,stonehenge mystery,1,Summer Solstice,1,Sunspots and climate,1,SuperConductivity,1,survival of fittest,1,sweet 31,1,Swine flue,1,taantra siddhee,1,tally presence system,1,Tantra-mantra,1,technical,1,technology,18,telomerase,1,Theory of organic evolution,1,Therapy in Rig veda,1,tokamak,1,Top 10 Blogger,1,Transit of Venus,1,TSALIIM Vigyan Gaurav Samman,1,tsunami warning,1,Tuberculosis Bacillus,1,tyndall effect,1,universe,14,Urdu Science Fiction Writer,1,vedic literature,1,VIDEO BOOK,1,Vigyan Pragati,1,Vigyan Prasar,1,Vision,1,Vividh Bharti,1,water,1,Web Technology,1,Wild life,3,Women Empowerment,1,Workshop,5,World Health Day,1,World no tobacco day,1,world trade center,1,Wormhole concept,1,Ya Perelman,1,yogendra,2,π,1,अंक,1,अंक गणित,1,अंतरिक्ष,1,अंतरिक्ष में सैर सपाटा,1,अंतरिक्ष यात्रा,1,अंतर्राष्ट्रीय सम्मलेन,1,अतिचालकता,1,अतीन्द्रिय दृष्टि,1,अतीन्द्रिय बोध,1,अथर्ववेद,1,अंध-विश्वास,2,अंधविश्‍वास,1,अंधविश्वास को चुनौती,3,अधिक मास,1,अध्यात्म,1,अनंत,1,अनसुलझे रहस्य,1,अन्तरिक्ष पर्यटन,3,अन्धविश्वास,3,अन्धविश्वास के खिलाफ,1,अभिषेक,8,अभिषेक मिश्र,4,अमरता,1,अम्ल वर्षा,1,अयुमु,1,अरुणाचल प्रदेश,1,अर्थ एक्सपेरीमेंट,3,अर्शिया अली,1,अलीगढ़ मुस्लिम युनिवर्सिटी,1,अलौकिक संगीत,1,अवसाद मुक्ति,1,अस्थि विज्ञान,1,आई आई टी,1,आई साईबोर्ग,1,आईएनएस अरिहंत,1,आकाश,1,आकाशगंगा,2,आटिज्‍म,1,आध्यात्म,1,आनंद कुमार,1,आनुवांशिक वाहक,1,आर्कियोलॉजी,1,आलम आरा,1,आविष्कार,1,आविष्कार प्रौद्योगिकी मोबाईल,1,इंटरनेट का सफर,1,इंडिव्हिजुअल व्हेलॉसिटी,1,इनविजिबल मैन,1,इन्जाज़-ऊंट प्रतिकृति,1,इन्द्रधनुष,1,इन्द्रनील भट्टाचार्जी,1,इन्द्रनील भट्टाचार्य,1,इशारों की भाषा,1,ईश्वर और विज्ञान,1,उजाला मासिक,1,उन्माद,1,उन्‍मुक्‍त,1,उप‍लब्धि,3,उबुन्टू,1,उल्‍कापात,1,उल्‍कापिंड,1,ऋग्वेद,1,एड्स जांच दिवस,1,एड्सरोधी क्रीम,1,एनिमल वेलफेयर बोर्ड ऑफ इंडिया,1,एल्कोहल,1,एल्फ्रेड नोबल,1,औरतों में दिल की बीमारी का खतरा,1,कदाचार,1,कपडे,1,कम्‍प्‍यूटर एवं तकनीक,4,कम्प्यूटर विज्ञान,1,करेंट साइंस,1,कर्मवाद,1,किसानों की आत्महत्याएँ,1,कीमती समय,1,कृत्रिम जीवन,1,कृत्रिम रक्‍त,1,कृषि अवशेष,1,केविन वार्विक्क,1,कैसे मजबूत बनाएं हड्डियां,1,क्रायोनिक्स,1,क्रैग वेंटर,1,क्षय मास,1,क्षेत्रीय भाषाओं में विज्ञान कथा लेखन,2,खगोल,1,खगोल विज्ञान,2,खगोल विज्ञान.,1,खगोल वेधशाला,1,खतरनाक व्‍यवहार,1,खाद्य विषाक्‍तता,1,खारा जल,1,खूबसूरत आँखें,1,गणित,3,गति,1,गर्भकाल,1,गर्भस्‍थ शिशु का पोषण,1,गर्मी से बचने के तरीके,1,गुणसूत्र,1,गेलिलियो,1,गोल्डेन नंबर,2,गौरैया,1,ग्रह,1,ग्रीष्मकालीन अयनांत,1,ग्रुप व्हेलॉसिटी,1,ग्रेफ़ाइट,1,ग्लोबल वार्मिंग,2,घाघ-भड्डरी,1,चंद्रग्रहण,1,चमत्कार,1,चमत्कारिक पत्थर,1,चरघातांकी संख्याएं,1,चार्ल्‍स डार्विन,1,चिकत्सा विज्ञान,1,चैटिंग,1,छरहरी काया,1,छुद्रग्रह,1,जल ही जीवन है,1,जान जेम्स आडूबान,1,जानवरों की अभिव्यक्ति,1,जीवन और जंग,1,जीवन की उत्‍पत्ति,1,जैव विविधता वर्ष,1,जैव शवदाह,1,ज्योतिष,1,ज्योतिष और अंधविश्वास,2,झारखण्‍ड,1,टिंडल प्रभाव,1,टीलोमियर,1,टीवी और स्‍वास्‍थ्‍य,1,टीवी के दुष्‍प्रभाव,1,टेक्‍नालॉजी,1,टॉप 10 ब्लॉगर,1,डा0 अब्राहम टी कोवूर,1,डा0 ए0 पी0 जे0 अब्दुल कलाम,1,डाइनामाइट,1,डाटा सेंटर,1,डिस्कस,1,डी•एन•ए• की खोज,3,डीप किसिंग,1,डॉ मनोज पटैरिया,1,डॉ. के.एन. पांडेय,1,डॉ० मिश्र,1,ड्रग एडिक्‍ट,1,ड्रग्स,1,ड्रग्‍स की लत,1,तम्बाकू,1,तम्‍बाकू के दुष्‍प्रभाव,1,तम्बाकू निषेध,1,तर्कशास्त्र,1,ताँत्रिक क्रियाएँ,1,थर्मोइलेक्ट्रिक जेनरेटर,1,थ्री ईडियट्स के फार्मूले,1,दर्दनाशी,1,दर्शन,1,दर्शन लाल बवेजा,3,दिल की बीमारी,1,दिव्‍य शक्ति,1,दुरबीन,1,दूरानुभूति,1,दोहरे मानदण्ड,1,धरोहर,1,धर्म,2,धातु विज्ञान,1,धार्मिक पाखण्ड,1,धुम्रपान और याद्दाश्‍त,1,धुम्रपान के दुष्‍प्रभाव,1,धूल-मिट्टी,1,नई खोजें,1,नन्हे आविष्कार,1,नमक,1,नवाचारी भौतिकी,1,नशीली दवाएं,1,नाइट शिफ्ट के दुष्‍प्रभाव,1,नारायणमूर्ति,1,नारी-मुक्ति,1,नींद और बीमारियां,1,नींद न आने के कारण,1,नेत्रदान और ब्लॉगर्स,1,नेत्रदान का महत्‍व,1,नेत्रदान कैसे करें?,1,नैनो टेक्नालॉजी,1,नॉटिलस,1,नोबल पुरस्कार,1,नोबेल पुरस्कार,2,न्‍यूटन,1,परमाणु पनडुब्‍बी,1,परासरण विधि,1,पर्यावरण और हम,1,पर्यावरण चेतना,2,पशु पक्षी व्यवहार,1,पहली बारिश,1,पाई दिवस,1,पुच्‍छल तारा,1,पुरुष -स्त्री लिंग अनुपात,1,पूर्ण अँधियारा चंद्रग्रहण,1,पृथ्वी की परिधि,3,पृथ्‍वेतर जीवन,1,पेट्रोल चोरी,1,पेंसिल,1,पैडल वाली पनडुब्बी,1,पैराशूट,1,पॉवर कट से राहत,1,पौरूष शक्ति,1,प्रकाश,2,प्रज्ञाएँ,1,प्रतिपदार्थ,1,प्रतिरक्षा,1,प्रदूषण,1,प्रदूषण और आम आदमी,1,प्ररेणा प्रसंग,1,प्रलय,2,प्रलय का दावा बेटुल्गुयेज,1,प्रसव पीड़ा,1,प्रेम में ।धोखा,1,प्रोटीन माया,1,प्लास्टिक कचरा,1,फाई दिवस,1,फिबोनाकी श्रेणी,1,फिबोनाची,1,फेसबुक,1,फ्रीवेयर,1,फ्रेंकेंस्टाइन,1,फ्रेंच किसिंग,1,बनारस,1,बायो-क्रेमेशन,1,बायोमैट्रिक पहचान तकनीकियाँ,2,बाल विज्ञान कथा,1,बालसुब्रमण्यम,6,बिग-बेंग सिद्धांत,1,बिजली,1,बिजली उत्‍पादन,1,बिजली कैसे बनती है?,1,बिजलीघर,1,बिली का विकल्‍प,1,बी0एम0डब्ल्यू0,1,बीरबल साहनी,1,बुलेटप्रूफ,1,बैल चालित पम्प,1,ब्रह्मण्‍ड,1,ब्रह्मा,1,ब्रह्माण्‍ड,1,ब्रह्माण्‍ड के रहस्‍य,1,ब्रह्मान्ड,1,ब्रेन म्‍यूजिक,1,ब्लॉग लेखन,1,ब्लॉग लेखन के द्वारा विज्ञान संचार,2,ब्लॉगिंग का महत्व,1,भारतीय आयुर्विज्ञान अनुसंधान परिषद,1,भारतीय विज्ञान कथा लेखक समिति,1,भारतीय वैज्ञानिक,2,भारतीय शोध,1,भूकंप के झटके,1,भूकम्‍प,1,भूगर्भिक हलचलें,1,मंगल,1,मधुमेह और खानपान,1,मनजीत सिंह बोपाराय,1,मनीष मोहन गोरे,1,मनीष वैद्य,1,मनु स्मृति,1,मनोरंजक गणित,1,महिला दिवस,1,माचू-पिचू,1,मानव शरीर,1,माया,1,मारिजुआना,1,मासिक धर्म,1,मिल्‍की वे,1,मिशन स्टारडस्ट-नेक्स,1,मीठी गपशप,1,मीमांसा,1,मुख कैंसर,1,मृत सागर,1,मेघ राज मित्र,1,मेडिकल रिसर्च,1,मेरी शैली,1,मैथेमेटिक्स ओलम्पियाड,1,मैरी क्‍यूरी,2,मैरीन इनोवेटिव टेक्नोलॉजीज लि,1,मोटापा,1,मोबाईल के नुकसान,1,मौसम,1,यजुर्वेद,1,युवा अनुसंधानकर्ता पुरष्कार,1,यूरी गागरिन,1,योगेन्द्र पाल,1,योगेश,1,योगेश रे,1,रक्षा उपकरण,1,राईबोसोम,1,रूप गठन,1,रेडियो टोमोग्राफिक इमेजिंग,1,रैबीज,1,रोचक रोमांचक अंटार्कटिका,4,रोबोटिक्स,1,लखनऊ,1,लादेन,1,लालन-पालन,1,लिनक्स,1,लिपरेशी,1,लीप इयर,1,लेड,1,लॉ ऑफ ग्रेविटी,1,लोक विज्ञान,1,लौह स्तम्भ,1,वजन घटाने का आसान तरीका,1,वाई गुणसूत्र,1,वायु प्रदुषण,1,वाशो,1,विज्ञान,1,विज्ञान कथा,3,विज्ञान कथा सम्मेलन,1,विज्ञान के खेल,2,विज्ञान चुटकले,1,विज्ञान तथा प्रौद्यौगिकी,1,विज्ञान प्रगति,1,विज्ञान ब्लॉग,1,विज्ञापन,1,विटामिनों के वहम,1,विद्युत,1,विवेकानंद,1,विवेचना-व्याख्या,1,विश्व नि-तम्बाकू दिवस,1,विश्व पर्यावरण दिवस,1,विश्व भूगर्भ जल दिवस,1,विष्णु,1,वीडियो,1,वीडियो बुक,1,वैज्ञानिक दृष्टिकोण,1,वैद्य अश्विनी कुमार,1,वोस्तोक,1,व्‍यायाम के लाभ,1,व्हेलॉसिटी,1,शिव,1,शुक्र पारगमन,1,शुगर के दुष्‍प्रभाव,1,शून्य,1,शोध परिणाम,1,शोधन,1,श्रृष्टि का अंत,1,सं. राष्ट्रसंघ,1,सकारात्‍मक सोच का जादू,1,संक्रमण,1,संख्या,1,संजय ग्रोवर,1,संज्ञात्मक पक्षी विज्ञान,1,सटीक व्‍यायाम,1,संत बलबीर सिंह सीचेवाल,1,सत्यजित रे,1,समय की बरबादी को रोचकने के उपाय,1,समाज और हम,1,समुद्र,1,संयोग,1,सर चन्द्रशेखर वेंकट रमन राष्ट्रीय विज्ञान दिवस,1,सर्प संसार,1,साइकोलोजिस्ट,1,साइनस उपचार,1,साइंस ब्लागर्स मीट,1,साइंस ब्लागर्स मीट.,2,साइंस ब्लॉग कार्यशाला,2,साइंस ब्लॉगर्स असोसिएशन अवार्ड,1,साइंस ब्लॉगर्स असोसिएशन रजिस्ट्रेशन,1,साइंस ब्लॉगर्स ऑफ दि ईयर अवार्ड,1,साइंस ब्लोगिंग,1,साईकिल,1,सामवेद,1,सामाजिक अभिशाप,1,सामाजिक चेतना,1,साहित्यिक चोरी,2,सिगरेट छोड़ें,1,सी. एस. आई. आर.,1,सी.वी.रमण विज्ञान क्लब,1,सीजेरियन ऑपरेशन,1,सुपर अर्थ,1,सुपर कम्प्यूटर,1,सुरक्षित ब्लॉगिंग,1,सूर्यग्रहण,2,सृष्टि व जीवन,3,सेक्स रेशियो,1,सेहत की देखभाल,1,सोशल नेटवर्किंग,1,स्टीफेन हाकिंग,1,स्पेन,1,स्मृति,1,स्वर्ण अनुपात,1,स्वाईन-फ्लू,1,स्वास्थ्य,2,स्‍वास्‍थ्‍य और खानपान,1,स्वास्थ्य चेतना,3,हमारे वैज्ञानिक,4,हरित क्रांति,1,हंसी के फायदे,1,हाथरस कार्यशाला,1,हिंद महासागर,1,हृदय रोग,1,होलिका दहन,1,ह्यूमन रोबोट,1,
ltr
item
Science Bloggers' Association: Satellite constellations: Astronomers warn of threat to view of Universe
Satellite constellations: Astronomers warn of threat to view of Universe
https://ichef.bbci.co.uk/news/624/cpsprodpb/5465/production/_110250612_astro3nsfsnationaloptical-infraredastronomyresearchlaboratorygeminiobservatory.png
Science Bloggers' Association
https://blog.scientificworld.in/2019/12/satellite-constellations-astronomers.html
https://blog.scientificworld.in/
https://blog.scientificworld.in/
https://blog.scientificworld.in/2019/12/satellite-constellations-astronomers.html
true
1415300117766154701
UTF-8
Loaded All Posts Not found any posts VIEW ALL Readmore Reply Cancel reply Delete By Home PAGES POSTS View All RECOMMENDED FOR YOU LABEL ARCHIVE SEARCH ALL POSTS Not found any post match with your request Back Home Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sun Mon Tue Wed Thu Fri Sat January February March April May June July August September October November December Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec just now 1 minute ago $$1$$ minutes ago 1 hour ago $$1$$ hours ago Yesterday $$1$$ days ago $$1$$ weeks ago more than 5 weeks ago Followers Follow THIS PREMIUM CONTENT IS LOCKED STEP 1: Share to a social network STEP 2: Click the link on your social network Copy All Code Select All Code All codes were copied to your clipboard Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy