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Don’t Miss: Gathering Planets, the Charioteer, and “Sirius” Star Clusters!

Elnath, which is also known as Beta Tauri, is the second-brightest star in the constellation of Taurus. Credit: WikiSky

What are some skywatching highlights in February 2023?

See JupiterJupiter is the largest planet in the solar system and the fifth planet from the sun. It is a gas giant with a mass greater then all of the other planets combined. Its name comes from the Roman god Jupiter.” data-gt-translate-attributes=”[{“attribute”:”data-cmtooltip”, “format”:”html”}]”>Jupiter and VenusVenus, the second planet from the sun, is named after the Roman goddess of love and beauty. After the moon, it is the second-brightest natural object in the night sky. Its rotation (243 Earth days) takes longer than its orbit of the Sun (224.7 Earth days). It is sometimes called Earth's "sister planet" because of their similar composition, size, mass, and proximity to the Sun. It has no natural satellites.” data-gt-translate-attributes=”[{“attribute”:”data-cmtooltip”, “format”:”html”}]”>Venus appear nearer each night, as they head for a close conjunction at the start of March. Use bright stars Capella and Elnath to identify the constellation Auriga, and then find your way to two distant star clusters using Sirius as a guidepost.

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What to look for in February: Planets gather, the charioteer, and “Sirius” star clusters! Venus and Jupiter cozy up, the constellation Auriga makes a worthy target, and two star clusters you can find using Sirius and a pair of binoculars.

  • All month – Jupiter and Venus are visible in the west after sunset. The two planets appear closer together each evening, as they head for a conjunction on March 1.
  • February 5 – Full moon
  • February 20 – New moon
  • February 22 – The crescent Moon sits just a degree apart from Jupiter in the western sky, with Venus hanging beneath them.
  • February 27 – Find the Moon and MarsMars is the second smallest planet in our solar system and the fourth planet from the sun. It is a dusty, cold, desert world with a very thin atmosphere. Iron oxide is prevalent in Mars' surface resulting in its reddish color and its nickname "The Red Planet." Mars' name comes from the Roman god of war.” data-gt-translate-attributes=”[{“attribute”:”data-cmtooltip”, “format”:”html”}]”>Mars high in the southwest after sunset, where they will appear less than a degree apart. 
  • All month – Locate the charioteer constellation, Auriga, by finding your way to its brightest star Capella. From Orion, look northward twice Orion’s height to find Capella. [see sky chart in the video]
  • All month – Use the brightest star in the sky, Sirius, in order to find your way to two easy-to-locate star clusters, M41 and M47, using binoculars.

Video Transcript:

What’s Up for February? The brightest planets converge, the constellation Auriga, and two star clusters you might want to get Sirius about.

All month long, you’ll notice the two brightest planets in the sky, Jupiter and Venus, appear closer together each evening. Find them in the west in the hour or so after sundown. On February 22nd, the crescent Moon sits just a degree apart from Jupiter, with Venus hanging beneath them. The two planets then continue to get closer in the sky over the following week, culminating in a close conjunction on March 1st.

Another nice pairing takes place on February 27th, when the Moon and Mars will appear less than a degree apart. You’ll find them high in the southwest after sunset.

The constellation Auriga makes for a worthy target to pick out in the February sky. Auriga represents an ancient chariot driver, and it’s often depicted as an entire person, but given the outline, you might prefer to think of it as one of a chariot’s wheels.

The brightest star in Auriga is Capella. Now, in Latin, Capella is a word for a female goat, and in addition to Capella, there are three little stars nearby, known as “the kids” – as in the name for baby goats, which is pretty fun.

Opposite Capella toward the south is the bright star Elnath. Technically it’s part of Taurus next door, but it helps define the roughly circular shape of Auriga.

This sky chart shows how to locate Capella, in order to identify the constellation Auriga. Just look northward twice the height of Orion to find Capella. Credit: NASA/JPL-Caltech

Auriga appears high in the western sky on February evenings, and it’s relatively easy to find, thanks to Capella and Elnath. From Orion, look northward twice the height of Orion, to find Capella. Then spot Elnath on Auriga’s opposite side and from there it’s pretty easy to identify the other stars that round out the shape of the charioteer constellation.

All month long, observers with access to a good pair of binoculars or a small telescope can hunt for two easy star clusters using the brightest star in the sky as a guidepost. They’re two open star clusters, M41 and M47. They’re called “open” because their stars are close together in space, but in sort of a diffuse structure.

To find them, start with brilliant Sirius, which is easy to pick out toward the south in the winter night sky. M41 lies just 4 degrees south of Sirius, and should be visible in the same field of view in binoculars, where it appears as sort of a faint patch of light. It’s about as wide on the sky as the full moon, though in actual extent it’s about 25 light-years across and is located about 2,300 light years away from us.

To find M47, you can also start at Sirius and work your way over toward the east about 12 degrees, and then a couple of degrees to the south north. It’s about the same size on the sky as M41, but just a little brighter. M47 lies about 1,600 light years away and occupies a volume of space about 12 light-years across.

Our own Sun is thought to have formed as part of a cluster like these. So finding them in the February sky can be a pretty neat way to connect with our own cosmic origins.

Here are the phases of the Moon for February.

The phases of the Moon for February 2023. Credit: NASA/JPL-Caltech

Stay up to date with all of NASAEstablished in 1958, the National Aeronautics and Space Administration (NASA) is an independent agency of the United States Federal Government that succeeded the National Advisory Committee for Aeronautics (NACA). It is responsible for the civilian space program, as well as aeronautics and aerospace research. Its vision is "To discover and expand knowledge for the benefit of humanity." Its core values are "safety, integrity, teamwork, excellence, and inclusion." NASA conducts research, develops technology and launches missions to explore and study Earth, the solar system, and the universe beyond. It also works to advance the state of knowledge in a wide range of scientific fields, including Earth and space science, planetary science, astrophysics, and heliophysics, and it collaborates with private companies and international partners to achieve its goals.” data-gt-translate-attributes=”[{“attribute”:”data-cmtooltip”, “format”:”html”}]”>NASA’s missions to explore the solar system and beyond at I’m Preston Dyches from NASA’s Jet Propulsion Laboratory, and that’s What’s Up for this month.


Source: SciTechDaily