घनचक्कर (उपन्यास), सिद्धान्त का कुरा (सिद्धान्त), मकैको अर्कै खेती (नाटक ), हंस (उपन्यास)
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Joined March 2011
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संरचनाको पीँधमा रहेकाहरूको पक्षमा annapurnapost.com/news/15478… via @Annapurna_Post
भर्खरै पत्ता लागेको पहीलो "हरियो" तारा ! कविहरुको कल्पना मा तारा को निक्कै कुरा आउँछ। प्रेमका संवादमा पनि। हरियो ताराले उक्त काव्यात्मक कल्पनामा केही फेरबदल पो ल्याउने हो कि? 🙂🙃🙃
The First Green Star Ever Found: A Dead Sun That Ate Its Planets and Now Glows Chartreuse
For decades astronomers had a confident rule: green stars don’t exist. Even when a star’s light peaks in the green part of the spectrum, the surrounding red and blue wavelengths usually wash it out into white or pale yellow. The human eye simply refuses to see a pure green star. Then the white dwarf WD J1330+6435 broke the rule.
Located about 280 light-years away in the constellation Draco, this object is no longer a living star. It is the dense, cooling core left behind after a Sun-like star died — roughly the mass of the Sun packed into a body the size of Earth. Such remnants are extremely faint, so no one will ever see its color with the naked eye. Astronomers have to trust spectra and models of human vision. Those models are unambiguous: if you could get close enough, the star would appear a pale yellowish-green — a ghostly chartreuse.
How a Dead Star Turned Green
The culprit is sodium. At some point WD J1330+6435 swallowed rocky debris from its own planetary system — pieces of planets or asteroids that wandered too close and were torn apart. The material polluted the star’s atmosphere with sodium, calcium, and lithium.
Under normal conditions sodium absorbs only a narrow slice of orange light (the same orange that makes sodium street lamps glow). In the ultra-dense helium atmosphere of a white dwarf, however, sodium atoms are constantly battered by helium atoms. This broadens the absorption dramatically: sodium removes a wide band of yellow, orange, and some red wavelengths. Calcium additionally blocks violet light. The remaining light peaks around 500 nanometers — the blue-green region — producing that pale chartreuse glow.
It is the cosmic equivalent of tossing copper wire or copper chloride into a campfire: the flame instantly turns green. Here the “fire” is a dead star, and the “copper” is the wreckage of its own planets.
A Whole Rainbow of White Dwarfs
Researchers at the University of Warwick examined 151 white dwarfs within about 65 light-years of Earth. Roughly one in thirty turned out not to be white at all. Some would look pink or salmon-colored (thanks to carbon dredged up from their interiors), others yellow, cyan, or purple. WD J1330+6435 is the first that vision models clearly paint green. Its surface temperature is only about 4,000 °C — cool for a star.
The color itself is less important than what it reveals. A polluted white dwarf acts like a perfect laboratory. It shreds and mixes the material of destroyed planets, then displays a clean spectrum. From the metal lines astronomers can reconstruct the chemistry of those lost worlds — essentially doing forensic science on planetary systems that no longer exist.
We will never see this green star with our own eyes; it is far too faint. But the spectra are reliable, and upcoming surveys should find more color anomalies. The universe has once again proved stranger than science fiction: even after death, a star can keep a very unusual “makeup” made from the remains of its own planets.
Sources: University of Warwick, CNN, Reuters...
Interesting!
The only life we know of developed in a solar system, so we tend to assume extraterrestrial life would be found on a planet orbiting a sun. But scientists theorize that under certain conditions, dark and wandering rogue planets could host life, too. 🔗 on.natgeo.com/eV07nq
गणीतका सुत्रहरु मानवले ले आविष्कार गरेका होइनन। गणीत त ब्रम्हान्डको कण कण मा "लेखिएको" छ। मानवले ती पहिले नै कोरिएका सुत्रहरु पत्ता लगाएका मात्र हुन। पत्ता लाउने क्रम अझै जारी छ
Lets Help Navin!
#HelpPost
Navin Pyasi Rai, a poet and journalist in Kathmandu, has spent over $20,000 on treatment since a scooter crash caused head injuries three years ago. He needs surgery abroad;Please share or donate through the GoFundMe page. #MedicalSupport gofund.me/674d39e3c
दुइ वटा ग्यालेक्सी हरु एक अर्कामा मिसिने क्रममा। एकअर्कामा ठोकिँदा मृत्यु र विनाश दुवै हुनेछ, तर सिर्जना र नयाँ सुरुवात पनि। प्रेममा झैँ। त्यसलो भए के ग्यालेक्सी हरुको मिलन ब्रम्हान्डिय प्रेम कथा को भाग हो? कविहरुले म भन्दा राम्रो ब्याख्या गर्न सक्नु होला 🙂🙂
NGC 3256 is a cosmic collision in progress — two gas-rich spiral galaxies locked in a slow-motion merger, their spiral arms twisted into dramatic tidal tails as they coalesce into one massive system.
This composite view layers three telescopes:
Chandra (pink) highlights intense X-ray point sources and shock-heated gas
Hubble (blue/white) reveals the sweeping stellar tidal tails
Webb** (red/orange) pierces the dust to expose furious hidden star formation
Mergers like this are a glimpse of our own distant future — a preview of what may happen when the Milky Way eventually collides with Andromeda.
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The internet is full of noise. But the right websites? They’re pure gold. 🌐
Here are 50 incredible websites that can help you explore the world, learn faster, discover hidden resources, and see things you never knew existed.
Some of these feel like internet secrets. 👇
🌎 EXPLORE THE WORLD
#milkywaygalaxy — Explore the Milky Way and space
flightradar24.com — Track flights around the world in real time
marinetraffic.com — See ships moving across the oceans
windy.com — Explore live weather, wind, and storm maps
lightningmaps.org — Track lightning strikes around the world
earthquake.usgs.gov — Check recent earthquakes worldwide
submarinecablemap.com — See the cables that connect the internet
globalforestwatch.org — Monitor forests and deforestation
worldometers.info — Explore live global statistics
internetlivestats.com — Watch internet activity and digital trends
🗺️ MAPS & VIRTUAL EXPLORATION
thetruesize.com — Compare the real sizes of countries
oldmapsonline.org — Explore historical maps from around the world
davidrumsey.com — Discover an incredible collection of historical maps
openstreetmap.org — Explore a free, community-built world map
window-swap.com — Look through windows in places around the world
virtualvacation.us — Take virtual walks through different locations
mapcrunch.com — Jump to a random location on Earth
atlasobscura.com — Discover unusual places and hidden wonders
neal.fun — Play with fun, interactive internet experiments
htwins.net/scale2 — Travel from the smallest particles
🚀 SPACE & SCIENCE
eyes.nasa.gov — Explore planets and space missions in 3D
stellarium-web.org — See the stars and constellations in your browser
apod.nasa.gov — Get a stunning NASA astronomy picture every day
images.nasa.gov — Browse NASA’s free image and video archive
pudding.cool — Explore fascinating stories told through data
ourworldindata.org — Understand global issues through real data
gapminder.org — Challenge common misconceptions about the world
informationisbeautiful.net — Turn complex information into visual stories
data.worldbank.org — Access economic and development data worldwide
data.tuik.gov.tr — Explore Turkey’s official statistics
📚 FREE KNOWLEDGE & DIGITAL ARCHIVES
archive.org — Explore archived websites, books, movies, and more
gutenberg.org — Read thousands of free public-domain books
openlibrary.org — Discover books and find available digital editions
loc.gov — Explore the U.S. Library of Congress digital collections
europeana.eu — Discover Europe’s cultural and historical collections
dp.la — Explore millions of items from America’s digital libraries
artsandculture.google.com — Visit museums and explore art from home
rijksmuseum.nl — Discover world-famous art and high-resolution images
wikiart.org — Explore art from different periods and movements
publicdomainreview.org — Discover fascinating forgotten treasures from history
openculture.com — Find free educational and cultural resources
metmuseum.org — Explore the Metropolitan Museum of Art’s collection
🎵 MUSIC, CURIOSITY & USEFUL TOOLS
musicmap.info — Explore the connections between music genres
radiooooo.com — Discover music by country and decade
listen.hatnote.com — Hear Wikipedia edits as they happen
wikipedia.org — Dive into a never-ending world of knowledge
timeanddate.com — Check time zones, sunrise times, and celestial events
sciencedaily.com — Discover the latest science news and research
arxiv.org — Read free scientific research preprints
observablehq.com — Create interactive data visualizations with code
Follow for more updates (@justinbrave21)
Bookmark this list. 🔖
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@TulsiSubedi8 & @SanDeshGrg777 tagged this Mountain Hawk-Eagle in Kaski, central Nepal, 6years ago and the transmitter is still sending signals!!! Both r passionate about advancing raptor research in Nepal & mentoring young researchers. They’re doing a fantastic job! 😀Well done!
ALT Mountain Hawk Eagle by Tulsi Subedi
सुर्य को तुलना मा पृथ्वी कति सानो रहेछ । यस्ता अरबौँ सुर्य मिलेर एउटा ग्यालेक्सी बन्छ।अनि अरबौँ ग्यालेक्सी बनेर ब्रम्हान्ड। सानो पृथ्वीमा बस्ने हामी साना मानव यस ब्रम्हान्डको तुलनामा कण को कण बराबर पनी छैनौे।तर हामी यो अरबौँ बर्ष देखि चलिआएको ब्रम्हान्डलाई बुझ्ने दाबी गर्छौ।
प्रकृति बडो बलवान छ। मानवले आफ्नो लोभले गर्दा प्रकृती ध्वस्त गर्दै ल्यायो। यस को परिणाम झन झन टडकारो बन्दै देखीँदै जाने छ।
बच्चा तारा हरु। तारा हरु नी बच्चा बाट हुर्कैदै युवा हुन्छन। युवा हुँदा हाम्रो सुर्य झै घपक्क बल्छन, उर्जाको उत्पादन गर्छन, अनि त्यसपछी बिस्तारै उर्जा सकिएर मर्दै जान्छन ।
Brewing up baby stars ⭐
@NASAWebb used infrared light to peer through the dust in this nebula, revealing many stars of different ages. This helps us study how stars change over time.
ALT A young star cluster filled with many stars that display Webb’s unique eight-pronged diffraction pattern. At its center is a yellow star which sports the largest diffraction pattern. To the left of the star, there is a region filled with yellow dust and gas. This yellow region extends from the bottom, covering about two-thirds of the image. The yellow region has several blue stars of different sizes embedded within. The top third, which lies outside of the yellow region, holds a few bright protostars, within dense gray gas. Those stars illuminate the gas, making it appear blue. A few red outflows from other protostars are visible above this grayish-blue region. To the right of the central star, there is a clumpy, flame-like plume of red dust and gas with protostars that emit a soft white light within. The plume is surrounded by more dense gray gas and dust.
