Pic of the Week: The Dance of R Aquarii

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Image (Credit): The R Aquarii binary star system. (NASA, ESA, Matthias Stute , Margarita Karovska , Davide De Martin (ESA/Hubble), Mahdi Zamani (ESA/Hubble))

This week’s image is from the Hubble Space Telescope. It shows a brilliant pattern in the sky about 700 light-years away. It is the product of an odd dance between two symbiotic stars, one red and the other white.

Here is more information about the image from the Hubblesite:

Located approximately 700 light-years away, a binary star system called R Aquarii undergoes violent eruptions that blast out huge filaments of glowing gas. The twisted stellar outflows make the region look like a lawn sprinkler gone berserk. This dramatically demonstrates how the universe redistributes the products of nuclear energy that form deep inside stars and jet back into space.

R Aquarii belongs to a class of double stars called symbiotic stars. The primary star is an aging red giant and its companion is a compact burned-out star known as a white dwarf. The red giant primary star is classified as a Mira variable that is over 400 times larger than our Sun. The bloated monster star pulsates, changes temperature, and varies in brightness by a factor of 750 times over a roughly 390-day period. At its peak the star is blinding at nearly 5,000 times our Sun’s brightness.

When the white dwarf star swings closest to the red giant along its 44-year orbital period, it gravitationally siphons off hydrogen gas. This material accumulates on the dwarf star’s surface until it undergoes spontaneous nuclear fusion, making that surface explode like a gigantic hydrogen bomb. After the outburst, the fueling cycle begins again.

This outburst ejects geyser-like filaments shooting out from the core, forming weird loops and trails as the plasma emerges in streamers. The plasma is twisted by the force of the explosion and channeled upwards and outwards by strong magnetic fields. The outflow appears to bend back on itself into a spiral pattern. The plasma is shooting into space over 1 million miles per hour – fast enough to travel from Earth to the Moon in 15 minutes! The filaments are glowing in visible light because they are energized by blistering radiation from the stellar duo.

Pic of the Week: Jupiter’s Changing Spot

Posted on by onespaceman2000
Image (Credit): Jupiter’s Great Red Spot captured by the Hubble Space Telescope over a 90 day period. (NASA, ESA, A. Simon (GSFC))

This week’s image is from the NASA/European Space Agency (ESA) Hubble Space Telescope. It captures one of the most identifiable objects in our solar system – Jupiter’s Great Red Spot.

Here is a little more from the ESA Hubble site:

Using Hubble Space Telescope data spanning approximately 90 days (between December 2023 and March 2024) when the giant planet Jupiter was approximately 630 million to 820 million kilometres from the Sun, astronomers measured the Great Red Spot’s size, shape, brightness, colour, and vorticity over one full oscillation cycle. The data reveal that the Great Red Spot is not as stable as it might look. It was observed going through an oscillation in its elliptical shape, jiggling like a bowl of gelatin. The cause of the 90-day oscillation is unknown.

Pic of the Week: Picture Perfect Spiral Galaxy

Posted on by onespaceman2000
Image (Credit): Hubble’s view of spiral galaxy IC 4709. (ESA/Hubble & NASA, M. Koss, A, Barth)

This week’s image comes from the Hubble Space Telescope. It shows an almost too perfect spiral galaxy that might have come from AI software, but it is a real image from NASA and ESA. You are looking at spiral galaxy IC 4709, which is about 240 million light-years away.

Here is more information on the image from the ESA’s Hubble site:

Its view here is studded with stars, many of which appear particularly large and bright thanks to their nearby locations in our own galaxy, and which feature the characteristic diffraction patterns caused by Hubble’s optics. Much further away — around 240 million light-years distant in fact, in the southern constellation Telescopium — is the spiral galaxy IC 4709. Its swirling disc filled with stars and dust bands is beautifully captured, as is the faint halo surrounding it. The compact region at its core might be the most remarkable sight, however: this is an active galactic nucleus (AGN).

Pic of the Week: Sparkling Candy Floss

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Image (Credit): The complex cluster of emission nebulae is known as N11. (NASA, ESA, J. M. Apellaniz from the Centro de Astrobiologia (CSIC/INTA Inst. Nac. de Tec. Aero., and Gladys Kober from NASA/Catholic University of America)

This week’s image is from the Hubble Space Telescope. It shows a cluster of stars that are about 160,000 light-years away in the Large Magellanic Cloud that orbits our Milky Way.

Here is the full story from NASA:

A bubbling region of stars both old and new lies some 160,000 light-years away in the constellation Dorado. This complex cluster of emission nebulae is known as N11, and was discovered by American astronomer and NASA astronaut Karl Gordon Henize in 1956. NASA’s Hubble Space Telescope brings a new image of the cluster in the Large Magellanic Cloud (LMC), a nearby dwarf galaxy orbiting the Milky Way.

About 1,000 light-years across, N11’s sprawling filaments weave stellar matter in and out of each other like sparkling candy floss. These cotton-spun clouds of gas are ionized by a burgeoning host of young and massive stars, giving the complex a cherry-pink appearance. Throughout N11, colossal cavities burst from the fog. These bubbles formed as a result of the vigorous emergence and death of stars contained in the nebulae. Their stellar winds and supernovae carved the surrounding area into shells of gas and dust.

Pic of the Week: Nebula RCW 7

Posted on by onespaceman2000
Image (Credit): RCW 7, a nebula located just over 5,300 light-years from Earth. (ESA/Hubble & NASA, J. Tan (Chalmers University & University of Virginia), R. Fedriani (Institute for Astrophysics of Andalusia))

This week’s image is from the NASA/European Space Agency’s (ESA) Hubble space telescope. It shows the nebula called RCW 7, which is located about 5,300 light-years away.

The ESA Hubble site describes the image in this way:

Clouds of gas and dust with many stars. The clouds form a flat blue background towards the bottom, and become more thick and smoky towards the top. They are lit on one side by stars in the nebula. A thick arc of gas and dust reaches around from the top, where it is brightly lit by many stars in and around it, to the bottom where it is dark and obscuring. Other large stars lie between the clouds and the viewer.