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Day by day Telescope: A view of our star as Earth reaches perihelion


Sol, imaged by NASA's Solar Dynamics Observatory.
Enlarge / Sol, imaged by NASA’s Photo voltaic Dynamics Observatory.

NASA

Welcome to the Day by day Telescope. There’s a little an excessive amount of darkness on this world and never sufficient gentle, slightly an excessive amount of pseudoscience and never sufficient science. We’ll let different publications give you a each day horoscope. At Ars Technica, we’ll take a unique route, discovering inspiration from very actual photographs of a universe that’s full of stars and marvel.

Good morning. It is January 4, and at this time’s picture is a photograph of our star, Sol. The picture was captured by NASA’s Photo voltaic Dynamics Observatory, a spacecraft in geosynchronous orbit, on Wednesday.

So why an image of the Solar? As a result of we have simply handed perihelion, the purpose at which planet Earth reaches its closest level to the Solar. This yr perihelion got here at 00:38 UTC on Wednesday, January 3. We received to inside about 91.4 million miles (147 million km) of the star. As a consequence of its barely elliptical orbit across the Solar, Earth will attain aphelion this yr on July 5, at a distance of 94.5 million miles (152 million km).

There’s a little bit of irony for these of us who dwell within the Northern Hemisphere, in fact. We strategy nearest to the Solar at virtually the coldest time of yr, simply a few weeks after the winter solstice. Our planet’s seasons are decided by Earth’s axial tilt, nonetheless, not its proximity to the Solar.

In any case, glad new yr, a time when the world can appear stuffed with risk—shiny and brilliant like a star.

Supply: NASA SDO

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