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2. F region - Wikipedia

   en.wikipedia.org/wiki/F_region

   The F 2 layer exists from about 220 to 800 km (140 to 500 miles) above the surface of the Earth. The F 2 layer is the principal reflecting layer for HF radio communications during both day and night. The horizon-limited distance for one-hop F 2 propagation is usually around 4,000 km (2,500 miles). The F 2 layer has about 10 6 e/cm 3. However ...

3. Ionosphere - Wikipedia

   en.wikipedia.org/wiki/Ionosphere

   Relationship of the atmosphere and ionosphere. The ionosphere (/ aɪ ˈ ɒ n ə ˌ s f ɪər /) [1] [2] is the ionized part of the upper atmosphere of Earth, from about 48 km (30 mi) to 965 km (600 mi) above sea level, [3] a region that includes the thermosphere and parts of the mesosphere and exosphere.

4. Ionospheric storm - Wikipedia

   en.wikipedia.org/wiki/Ionospheric_storm

   The F-region is the highest region of the ionosphere. Consisting of the F1 and F2 layers, its distance above the Earth's surface is approximately 200–500 km. [7] The duration of these storms are around a day and reoccur every approximately 27.3 days. [6] Most ionospheric abnormalities occur in the F2 and E layers of the ionosphere.

5. Kennelly–Heaviside layer - Wikipedia

   en.wikipedia.org/wiki/Kennelly–Heaviside_layer

   Layers of the ionosphere.The Kennelly–Heaviside layer is the E region. The Heaviside layer, [1] [2] sometimes called the Kennelly–Heaviside layer, [3] [4] named after Arthur E. Kennelly and Oliver Heaviside, is a layer of ionised gas occurring roughly between 90km and 150 km (56 and 93 mi) above the ground — one of several layers in the Earth's ionosphere.

6. These new telescope images of the sun are just spectacular - AOL

   www.aol.com/telescope-images-sun-just...

   A new solar telescope in Hawaii has released a series of images of the sun that peer inside the depths of its sunspots and so-called "quiet regions." The sun may be close to 94 million miles away ...

7. Solar Orbiter images capture the Sun like never before

   www.aol.com/solar-orbiter-images-capture-sun...

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8. File:Ionosphere Layers en.svg - Wikipedia

   en.wikipedia.org/wiki/File:Ionosphere_Layers_en.svg

   This image is a derivative work of the following images: File:IonosphereLayers-NPS.gif licensed with PD-USGov 2008-10-11T12:52:41Z Sebman81 400x300 (12915 Bytes) {{Information |Description={{en|1=Ionospheric layers. At night the E layer and F layer are present. During the day, a D layer forms and the E and F layers become much stronger.

9. Solar Orbiter captures the highest-resolution images of the ...

   www.aol.com/news/solar-orbiter-captures-highest...

   Together, the new images showcase the sun’s varied and complex layers. The Polarimetric and Helioseismic Imager took the highest-resolution full views of the sun’s visible surface, or ...