Pic of the Week: Martian Highlands

Posted on by onespaceman2000
Image (Credit): (ESA/DLR/FU Berlin)

This week’s image comes from the the European Space Agency (ESA). Captured by ESA’s orbiting Mars Express, you are looking at a portion of the crater-covered Arabia Terra, which is a large plain in Mars’s ancient highlands. You can read more about this Martian region by visiting this site.

Here is the ESA’s description of what you are viewing:

A high‑resolution overhead view of a rocky, desert‑like landscape on Mars. The surface is mostly reddish‑brown with patches of darker blue‑grey tones. Many circular impact craters of different sizes are scattered across the scene, some with raised rims and shadowed interiors. Subtle ridges, eroded valleys, and textured terrain patterns run diagonally through the image, giving a sense of ancient geological activity. The overall impression is of a dry, rugged, and heavily cratered Martian surface.

Pic of the Week: Annular Solar Eclipse Over Antarctica

Posted on by onespaceman2000
Image (Credit): The’ solar eclipse as seen from the Concordia research station in Antarctica on February 17, 2026. (ESA/IPEV/PNRA-A. Traverso)

This week’s image comes from the European Space Agency (ESA). It shows the “Ring of Fire” solar eclipse earlier this month from Antarctica. It was captured over the French and Italian Concordia research station.

Here is more from ESA on this image and the Concordia research station:

Peaking at 19:47 local time (12:47 CET), the Moon passed directly in front of the Sun’s centre, leaving only a thin, glowing annulus of sunlight visible. Astronomers call this moment annularity, and it lasted just two minutes, though the full partial eclipse spanned around two hours…Concordia sits 1100 km inland at an altitude of 3200 m. It is currently summer at the station: today, the Sun stayed above the horizon for nearly 20 hours, with temperatures reaching a comparatively mild –29 °C. But soon the light will fade: from May to August, the Sun will not rise at all, plunging the station into four months of continuous darkness where temperatures can fall below –80 °C. During this polar winter, the crew must live in complete isolation and full autonomy.

Pic of the Week: A Protostar in the Cepheus A Region

Posted on by onespaceman2000
Image (Credit): The Cepheus A region, including a protostar causing much of this region’s illumination. (NASA, ESA, and R. Fedriani (Instituto de Astrofisica de Andalucia); Processing: Gladys Kober (NASA/Catholic University of America))

This week’s image was taken by the Hubble Space Telescope. It shows the star-forming region Cepheus A in the constellation of Cepheus. This region is about 2,400 light-years away.

Here is more from NASA about this region:

The high-mass star-forming region Cepheus A hosts a collection of baby stars, including one large and luminous protostar, which accounts for about half of the region’s brightness. While much of the region is shrouded in opaque dust, light from hidden stars breaks through outflow cavities to illuminate and energize areas of gas and dust, creating pink and white nebulae. The pink area is an HII region, where the intense ultraviolet radiation of the nearby stars has converted the surrounding clouds of gas into glowing, ionized hydrogen.

Pic of the Week: Another View of the Milky Way

Posted on by onespaceman2000
Image (Credit): The Milky Way galaxy in radio waves as seen from the Southern Hemisphere. (Silvia Mantovanini and the GLEAM-X Team)

The image above was released late last year. It shows the Milky Way galaxy in radio-color captured by astronomers from the International Centre of Radio Astronomy Research (ICRAR). All of this was part of the GaLactic and Extragalactic All-sky MWA (GLEAM) and GLEAM-X (GLEAM eXtended) surveys conducted over 28 nights in 2013 and 2014 as well as 113 nights from 2018 to 2020.

In describing the image, Silvia Mantovanini, one of the astronomers analyzing the survey data, noted:

You can clearly identify remnants of exploded stars, represented by large red circles. The smaller blue regions indicate stellar nurseries where new stars are actively forming.

In this video, you can hear more from astronomers Silvia Mantovanini and Natasha Hurley-Walker who co-wrote a paper on this work titled GaLactic and extragalactic all-sky Murchison Widefield Array survey eXtended (GLEAM-X) III: Galactic plane.

Pic of the Week: Close-Up View of the Helix Nebula

Posted on by onespaceman2000
Image (Credit): Part of the Helix Nebula as captured by NASA’s James Webb Space Telescope. (NASA, ESA, CSA, STScI; Image Processing: Alyssa Pagan (STScI))

This week’s image from the James Webb Space Telescope (JWST) shows an up-close view of the Helix Nebula, which is about 650 light years away. Taken by the JWST’s Near-Infrared Camera, we see the colors of the gases moving away from the exploding star.

NASA notes:

Here, blistering winds of fast-moving hot gas from the dying star are crashing into slower moving colder shells of dust and gas that were shed earlier in its life, sculpting the nebula’s remarkable structure…A blazing white dwarf, the leftover core of the dying star, lies right at the heart of the nebula…Its intense radiation lights up the surrounding gas, creating a rainbow of features: hot ionized gas closest to the white dwarf, cooler molecular hydrogen farther out, and protective pockets where more complex molecules can begin to form within dust clouds. This interaction is vital, as it’s the raw material from which new planets may one day form in other star systems.

Below is a wider view of the nebula from which the image above is taken.

Image (Credit): The full view of the Helix Nebula, taken by the ground-based Visible and Infrared Telescope for Astronomy as well as the JWST’s more focused view. (ESO, VISTA, NASA, ESA, CSA, STScI, J. Emerson (ESO); Acknowledgment: CASU)