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pernickety    
a. 不大方的,爱挑剔的,难以取悦的

不大方的,爱挑剔的,难以取悦的

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  • Aurora - Wikipedia
    In the Arctic they are called northern lights (aurora borealis); in the Antarctic, the terms southern lights (aurora australis) are used [2][3] Auroras display dynamic patterns of radiant light that appear as curtains, rays, spirals or dynamic flickers covering the entire sky
  • Aurora Dashboard (Experimental) | NOAA NWS Space Weather Prediction . . .
    This page provides a prediction of the aurora’s visibility tonight and tomorrow night in the charts below The animations further down show what the aurora’s been up to over the last 24 hours and estimates what the next 30 minutes will be like
  • Auroras - NASA Science
    Also known as the northern lights (aurora borealis) or southern lights (aurora australis), auroras are colorful, dynamic, and often visually delicate displays of an intricate dance of particles and magnetism between the Sun and Earth called space weather
  • Northern lights (aurora borealis): What they are and how to see them
    Whether you're planning a trip to see the northern lights or just curious about the science behind them, here's everything you need to know about what causes the northern lights, when and where
  • Aurora - National Geographic Society
    An aurora is a natural light display that shimmers in the sky Blue, red, yellow, green, and orange lights shift gently and change shape like softly blowing curtains Auroras are only visible at night, and usually only appear in lower polar regions
  • Northern Lights Forecast - Aurora Visibility Map
    Track real-time aurora activity with interactive maps, Kp index forecasts, and solar wind data Never miss the northern lights again
  • Auroras: The Northern and Southern Lights - Center for Science Education
    Particles from solar eruptions bombard Earth’s magnetic field and enter the atmosphere at regions called auroral ovals These particles interact with gases in the atmosphere, creating auroras Auroras are a natural interaction between the Sun and Earth's atmosphere
  • Northern Lights Live Tracker | Aurora Forecast Kp-Index Tonight
    Track the Northern Lights live with our real-time Kp-index monitor and aurora forecast map See if the aurora borealis is visible in your location right now
  • What is an aurora? The psychedelic lights explained
    Over millennia, humans have observed and been inspired by beautiful displays of light bands dancing across dark night skies Today, we call these lights the aurora: the aurora borealis in the
  • Northern lights Forecast | Live Predictions Worldwide
    Track the Northern Lights in real-time with PolarForecast KP index and aurora forecasts for top locations like Tromsø, Lofoten more





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