Thursday, July 3, 2025

Peering Into a Starburst Galaxy With the JWST

This is the NASA/ESA/CSA James Webb Space Telescope Picture of the Month. The powerful infrared space telescope captured this image of the Cigar Galaxy (M82) with its Mid-Infrared Instrument (MIRI). Rather than reveal the presence of the galaxy's stars, it shows the infrared emissions from warm dust and clouds of polycyclic aromatic hydrocarbons (PAHs). Image Credit: ESA/Webb, NASA & CSA, A. Bolatto. CC BY 4.0 INT

Astronomers used the JWST to examine M82, a nearby starburst galaxy. M82 is forming stars at a prodigious rate due to its interactions with its neighbour, M81. It produces thousands of solar masses of stars per year, much more than the Milky Way.



Wednesday, July 2, 2025

Weather Satellites Can Even Study the Weather Over on Venus

Venus as seen by Himawari satellites. A photo with magnified sections to show just how small Venus is in the field of view of the observation satellites. Despite this limitation, researchers can still gather useful data. ©2025 Nishiyama et al. CC-BY-ND

A pair of Japanese weather satellites took a break from monitoring Earth weather to sneak a peek at Planet Venus. Despite the fact that it's relatively tiny, and millions of kilometers away, they were able to detect changes in Venus' cloud-top temperatures and see patterns and structure in its upper atmosphere. There are long-term trends on Venus that these long-lasting satellites will be able to study, beyond the timeframe of a shorter mission.



Tianwen-2 Looks Back at the Earth

Earth, seen by Tianwen-2. Credit: CNSA

China's asteroid probe turned its cameras back towards the Earth and Moon, capturing an image of our home planet on May 30, 2025. The image was taken when the spacecraft was about 590,000 km away, speeding towards asteroid 2016HO3, where it will retrieve a sample and bring it back to Earth before carrying on to main-belt comet 311P. The spacecraft has been in flight for 33 days and is now over 12 million kilometers from Earth.



In the Search for Earth-like Worlds, We Should Probably Focus on Red Dwarfs

In this artist's illustration, several small exoplanets orbit an M-dwarf (red dwarf) star. New research suggests that these low-mass stars often host Earth-like exoplanets. Image Credit: NASA/JPL-Caltech/MSSS.

According to the latest studies led by Heidelberg University astronomers, low-mass stars quite often host Earth-like planets. Data collected as part of the CARMENES project were the basis of this finding. By analyzing the data, an international research team succeeded in identifying four new exoplanets and determining their properties.



Inbound: Astronomers Discover Third Interstellar Object

The new interstellar object candidate A11pl3Z remotely imaged on July 2nd using iTelescope.Net in Chile. Credit: Filipp Romanov.

A newly discovered object may give astronomers an opportunity to study an interstellar visitor like never before. The object (A11pl3Z) is currently at +18th magnitude, moving slowly along the border of the constellations Serpens Cauda and Sagittarius, right near the galactic plane. The object was captured on July 2nd by the Deep Random Survey remote telescope in Chile. The Asteroid Terrestrial-impact Last Alert System (ATLAS) based in Rio Hurtado made the discovery on July 1st. Sam Deen soon backed this up with pre-discovery images from worldwide ATLAS sites in Chile, Hawaii and South Africa from June 25-29.



Tuesday, July 1, 2025

Titan is the Perfect Benchmark for Studying Exoplanet Atmospheres

A composite image of Saturn's moon Titan taken by the Cassini spacecraft. NASA

While we know of thousands of exoplanets, the science of studying their atmospheres is still in its early days. When astronomers analyze atmospheres, they have to decide which molecules to include in their models, which can bias the results. A new paper proposes that Cassini data on Titan could provide the perfect benchmark, helping to distinguish between different hydrocarbons detected in the atmosphere of an exoplanet.



Mercury Joins the 4th of July Fireworks Show

Mercury and the Moon as seen from Asilah, Morocco in 2016. Credit: Dave Dickinson

For folks in the United States, July evenings mean 4th of July fireworks. While you’re waiting for the show, be sure to watch for the most elusive of the planets as twilight falls, as Mercury shines at its very best for 2025. If you’ve never seen the innermost world before, now is a good time to try. This is because Mercury reaches greatest elongation, or its greatest point from the Sun as seen from our Earthly vantage point later this week.