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2. Symbiotic binary - Wikipedia

   en.wikipedia.org/wiki/Symbiotic_binary

   They usually contain a white dwarf with a companion red giant. The cool giant star loses material via Roche lobe overflow or through its stellar wind, which flows onto the hot compact star, usually via an accretion disk. Symbiotic binaries are of particular interest to astronomers as they can be used to learn about stellar evolution.

3. White dwarf - Wikipedia

   en.wikipedia.org/wiki/White_dwarf

   The most common observable evidence of a remnant planetary system is pollution of the spectrum of a white dwarf with metal absorption lines. 27–50% of white dwarfs show a spectrum polluted with metals, [153] but these heavy elements settle out in the atmosphere of white dwarfs colder than 20 000 K.

4. WD J2147–4035 - Wikipedia

   en.wikipedia.org/wiki/WD_J2147–4035

   The white dwarf existed for 10.21 ±0.22 Gyrs, meaning the total age is 10.7 ±0.3 Gyrs. [1] Cold white dwarfs are often strongly affected by collision induced absorption (CIA) of hydrogen. This can lead to faint optical red and infrared brightness. These white dwarfs are also called IR-faint white dwarfs. WD J2147–4035 is however very red (r ...

5. An easy hummingbird food recipe for bringing more to your garden

   www.aol.com/lifestyle/2020-07-21-hummingbird...

   1/4 cup refined white sugar. 1 cup water. ... hummingbird sage and any other native-grown red tubular flowers to your garden. Shop: ... Hapito Glass Blown Hummingbird Feeder, $24.99. Credit: Amazon.

6. Bird feeder - Wikipedia

   en.wikipedia.org/wiki/Bird_feeder

   A hummingbird feeder with red nectar. Hummingbird feeders, rather than dispensing seed, supply liquid nourishment to hummingbirds in the form of a sugar solution. The solution is normally 4 parts water to 1 part white sugar. Only pure refined white cane or beet sugar should be used, according to experts: [3] [4] [5] [6]

7. Do Hummingbird Swings Really Attract Hummingbirds To Your Yard?

   www.aol.com/hummingbird-swings-really-attract...

   While there are plenty of hummingbird feeders, a hummingbird swing may also make your yard an attractive space for this species, because hummingbirds use perches to rest and sometimes watch over ...