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Gear up for Saturn's annual show in the night sky!
Starting Monday (Aug. 2), you can find Saturn shining in the sky as part of a celestial phenomenon called opposition. Earth and the ringed planet will be on the same side of the sun and connected with our star by an invisible line, allowing skygazers on Earth to see a fully illuminated Saturn. Saturn reaches this brightest point at about 2 a.m. EDT (0600 GMT) on Monday, according to the website EarthSky.org. It will be highest in the sky around midnight local time and located in the constellation Capricornus.
Skywatchers will be able to spot several gems, the most obvious being Saturn's rings. This year, Saturn's northern hemisphere will be tilted in our direction at a slant that allows for a nice look at Saturn's rings inclined at an angle of 18 degrees with respect to Earth, according to the website In-The-sky.org. The angle should also allow sunlight to reflect off the icy rings to illuminate them from our perspective.
On Monday (Aug. 2), Saturn will reach opposition among the stars of central Capricornus. At opposition, Saturn will be at a distance of 830.6 million miles (1.337 billion kilometers) from Earth, and it will shine at magnitude of 0.18 — its brightest for 2021.
(Image credit: Starry Night)
Viewers may also get to see Titan, Saturn's largest moon. "Through a small telescope, Titan is actually pretty easy," astronomer Phil Plait told NPR. "If you take a look, you might see a little star right next to Saturn. That might very well be Titan — you can go online and find planetarium software" to confirm it, he said.
Carlos Blanco, a particle physicist at Princeton University and an avid skywatcher, told Space.com that he recommends viewing Saturn with a telescope that offers a narrow field of view and high magnification.
"In the sky, planets are unique in that they are relatively bright but almost point-like, as opposed to the moon or the Andromeda galaxy, which extend several degrees in the sky," he said.
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"So to get a good look at them, you want to have a scope such that the image you see in the viewfinder is roughly as big as the planet. In other words, the circle that the viewer makes in the sky should be very tight around that point of light," he said. "Roughly speaking, the higher the magnification power of the telescope, the smaller the field of view, and vice versa."
The night sky when viewed looking south from New York City around 2:00 a.m. local time, when Saturn reaches opposition. This image was created by Dominic Ford from In-the-sky.org.
(Image credit: Dominic Ford/In-the-sky.org)
Don't worry if you can't locate a telescope in time, because Saturn is one of the most distant objects that people can view in the sky with the naked eye. As a general rule of thumb, Plait recommends finding the brightest point in the night sky (after Venus has set, that is — that planet is easy to recognize because it shines low in the sky after sunset or before sunrise). That bright point is Jupiter, he told NPR, and Saturn will be the next-brightest point in the sky, west of Jupiter.
Understanding how opposition works will help, too. Opposition occurs when a planet appears opposite the sun in Earth's sky. In this case, Saturn will climb high in the Northern Hemisphere's sky at night because it is opposite the sun, which is high in the sky on the daytime side.
Follow Doris Elin Urrutia on Twitter @salazar_elin. Follow uson Twitter @Spacedotcom and on Facebook.
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