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Super Blue Blood Moon 2018: How to Watch, Live Stream Early Wednesday, for the first time in 152 years, Americans will witness a rare trifecta of lunar activities: a super blue blood moon. This is when three unique lunar events occur: a super moon, a blue moon, and a blood moon. But it won’t be a goodnight moon or a midday event like a total eclipse—it’ll actually occur in the morning, beginning a little before 6 a.m. on the east coast. CLICK HERE TO WATCH LIVE NOW What’s a Super Moon? If “super moon” sounds familiar, that’s because one just occurred before the New Year. What earns this full moon the “super” moniker is a coincidence that goes back to the moon’s orbit around the Earth. Depending on when a moon is in its orbit, a full moon can appear far away (the farthest point being the “apogee)”, or—in the case of the super moon that occurred both on December 3 and will occur again on Wednesday—at the point of the orbit closest to Earth. While that might not seem like a big deal, the distance between the apogee and perigee is nearly 30,000 miles, or a distance that clocks in at longer than the distance of the Earth. Thanks to the fact that it’s winter right now (which means the Northern Hemisphere of the Earth is tilted more towards the Milky Way than during the summer, when it’s tilted away) the moon simply appears brighter. What’s a Blue Moon? Wednesday’s super moon is also a blue moon, which actually has very little to do with color. The moon certainly can appear blue at times, but anyone who’s looked up at the sky has also seen the moon appear golden, pinkish, orange, even red (the signifier of a blood moon—more on that in a bit). What actually makes this moon a “blue” one is the fact that it’s the second full moon in a calendar month. A lunar cycle is about 29.5 days, which means that in most cases, it’s safe to say that each month is going to have just one full moon. January, however, is a longer month, with 31 days; the most recent full moon was on January 1. What’s a Blood Moon? This full moon couldn’t stop at just being a super blue moon—it’s a blood moon, too, which is a specific type of lunar eclipse (this is where the color part comes in). The fact that the moon shines in the sky isn’t because it’s a naturally glowing interstellar object, but the fact that it reflects the sun. The way we view the moon on Earth, however, is akin to wearing sunglasses: There’s a barrier to how we view the moon, and that barrier is the atmosphere, whose composition can alter how we see the moon. When the sun’s rays pass through the atmosphere, they undergo a process called Rayleigh scattering, where the more violet hues are filtered out but the more red hues come through. During a blood moon, the moon lines up perfectly with the Earth and sun, but in a way that blocks out the sun, so that those reddish rays coming through from Rayleigh scattering tinge the moon a brilliant, fiery “blood” color. The sunlight is scattering and bending more than usual, causing the moon to appear red (and no, it’s not the end of times). How to Live Stream the Event Not only do winter skies tend to be cloudy, but dawn’s presence around the corner from the umbra time, means sunlight could (ironically) get in the way of seeing the super blue blood moon. That and, if you’re on the East Coast, you really only have a few minutes to see the (literal) once-in-a-blue-moon event. Here’s where technology comes to play. NASA will live stream the moon event from its public and moon-focused channels with coverage starting at 5:30 a.m. ET and lasting until about 11:30 a.m. EST. The Virtual Telescope will live stream as well. NASA will also have a live stream from the Armstrong Flight Research Centeroff Edwards Air Force Base in the Mojave Desert. Los Angeles’s Griffith Observatory will have a live stream. For desert sky clarity, look to the University of Arizona’s Mt. Lemmon SkyCenter. The next total lunar eclipse will be viewable from North America next year, on January 21, 2019. Alas, that one will only be a super blue moon
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बुधवारको चन्द्रग्रहण किन यति दुर्लभ खालको? विशेष किसिमको ग्रहणको अवस्थामा देखा पर्ने ब्लड मुन वा रक्त चन्द्र, पूर्ण चन्द्र ग्रहण तथा एकै महिनाभित्रकै दोस्रो पूर्णिमा एकै चोटि पर्दा हुने ब्लु मुन एकैचोटि परेको यस्तो खगोलीय घटना यो भन्दा १५२ वर्ष पहिले पनि भएको थियो। यो दुर्लभ घटना सबै ठाउँबाट राम्ररी देख्न भने सकिने छैन। संयुक्त राज्य अमेरिकाको पश्चिमी भाग, अस्ट्रेलिया र पूर्वी एसियाबाट चन्द्रग्रहणको दृश्य राम्रोसँग देखिने अन्तरिक्षसम्बन्धी अमेरिकी संस्था नासाले बताएको छ। तर यूरोपका धेरैजसो भाग, अफ्रिका तथा दक्षिण अमेरिका भने यो दृश्य देख्नबाट वञ्चित रहने बताइएको छ। बुधवारको रात नै पृथ्वीको एकमात्र प्राकृतिक भू-उपग्रह चन्द्रमा, पृथ्वीको एकदमै नजिक पनि आएको छ। अमेरिकामा खग्रास सूर्य ग्रहणका दृश्य विशेषता के के? अझ जोड दिएर भन्ने हो भने बुधवारको चन्द्रग्रहणका क्रममा तीनवटा खगोलीय घटना एकैसाथ भएका छन्। सुपरमुन, ब्लु मुन र ब्लड मुन 'सुपरमुन' भन्नाले त्यस्तो खगोलीय घटना हो जतिबेला चन्द्रमा पृथ्वीको सबैभन्दा नजिक हुन्छ र १४ प्रतिशत बढी चम्किलो हुन्छ। एकै महिनाभित्र पूर्ण चन्द्रमा दुई पटक देखिने अवस्थालाई 'ब्लु मुन' भनिन्छ। खासमा चन्द्र ग्रहण लाग्दा पृथ्वीको छायाले गर्दा चन्द्रमा कालो देखिन पुग्छ। तर आज लागेको चन्द्रग्रहणको क्रममा केही सेकेण्डका लागि चन्द्रमा पूरै रातो पनि देखिने बताइएको छ र यही अवस्थालाई 'ब्लड मुन' भनिन्छ। ग्रहण पृथ्वीले सूर्यलाई र चन्द्रमाले पृथ्वीलाई परिक्रमा गर्ने क्रममा जब पृथ्वी सूर्य र चन्द्रमाको बीचमा आइपुग्छ, तब सूर्यको प्रकाशलाई पृथ्वीले छेकिदिन्छ। त्यस्तो अवस्थामा चन्द्रमामा पृथ्वीको छाया देखिन्छ। छायाको त्यस्तो अवस्था नै चन्द्रग्रहण हो। चन्द्रमाको पूरै भाग छायाले छोपेको अवस्थालाई खग्रास चन्द्रग्रहण भनिन्छ र आधा वा केही भाग मात्र ढाकेको अवस्थालाई खण्डग्रास चन्द्रग्रहण भनिन्छ। चन्द्रग्रहण पूर्णिमा तिथिका दिन लाग्दछ । बुधवारको चन्द्र ग्रहण सन् २०१८ को पहिलो ग्रहण हो। ३३ वर्षभन्दा कम उमेरका मानिसहरुले आफ्नो जीवनमा 'ब्लड मुन' देख्न पाएको यो नै पहिलो मौका हो। नासाका अनुसार पछिल्लो पटक यस्तो ग्रहण सन् १९८२ मा लागेको थियो र अब त्यस्तो मौका २५ वर्षपछि मात्र सन् २०३३ मा आउनेछ। खगोल वैज्ञानिकहरुका लागि पनि बुधवारको घटना एकदम महत्वपूर्ण हो।