Pic of the Week: Preparing the Nancy Grace Roman Space Telescope

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Image (Credit): Members of NASA’s Nancy Grace Roman Space Telescope propellant, safety, and quality assurance team. (NASA/Sydney Rohde (Rocz))

The image above, taken on July 20th, shows one of the many teams working on the Nancy Grace Roman Space Telescope as it gets ready for its launch on August 30th. The pictured individuals are part of the propellant, safety, and quality assurance team.

NASA’s latest update on the mission stated:

Technicians completed fueling NASA’s Nancy Grace Roman Space Telescope, bringing it an important step closer to launch. On July 25, the team completed operations that carefully loaded 290 gallons of hydrazine fuel into the observatory at the Payload Hazardous Servicing Facility at NASA’s Kennedy Space Center in Florida.

After launch and separation from the rocket, Roman will use this onboard propellant to perform maneuvers as it travels to Sun-Earth Lagrange point 2, or L2, located about one million miles from Earth. There, about four times the distance to the Moon, it will have an ideal home for astronomy.

Pic of the Week: Psyche Spacecraft Approaching Mars

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Image (Credit): This composite of images shows how Mars appeared as a thin crescent as the Psyche spacecraft approached the planet. (NASA/JPL-Caltech/ASU)

This week’s image is from NASA’s Psyche spacecraft, which was doing a flyby of Mars last month for a gravity assist on it way to asteroid Psyche in 2029. What you are seeing is a composite photo of the crescent of the planet as the Psyche spacecraft approached it. NASA shared the photo on July 17, 2026.

You can see much more related to this flyby at this NASA link.

Pic of the Week: Chinese Probe Captures Earth’s Quasi-Moon

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Image (Credit): Image of asteroid 2016 HO3, also called Kamo‘oalewa, captured by a Chinese probe. (China National Space Administration )

This week’s image comes from a Chinese probe called Tianwen-2. It shows the spinning asteroid 2016 HO3, or Kamo‘oalewa, which is labeled by some of a “quasi-moon” of Earth until it decides to move on. Unlike the actual Moon, this asteroid is simply joining the Earth as it circles the Sun. The asteroid is about the size of a school bus.

The Chinese probe, launched from China in May 2025, is believed to have started its orbit of asteroid Kamo‘oalewa on June 6th of this year. It is now believed to be a rubble-pile asteroid, meaning it is basically loose material rather than a solid object. Even so, the Chinese probe may try to grab a sample to be returned to Earth in November 2027.

The source of the asteroid is still being debated, with some believing it is a piece of the Moon dislodged by an incoming asteroid while others believe it comes from the main asteroid belt.

In a paper released last year, scientists were leaning towards its origin being the main asteroid belt, noting:

Quantitative estimates show that population models of [Near Earth Asteroids] based on the migration of objects from the main belt are capable of accounting for Kamo‘oalewa-like objects. This relative contribution supports the hypothesis that (469219) Kamo‘oalewa originated from the main belt, which will be further investigated by future observations and in situ exploration of the Tianwen-2 spacecraft.

How long will it remain Earth’s partner? Back in 2021, Renu Malhotra, a UArizona planetary sciences professor, stated:

It will not remain in this particular orbit for very long, only about 300 years in the future, and we estimate that it arrived in this orbit about 500 years ago.

Pic of the Week: Beauty and the Beast

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Image (Credit): Chinese photographers’ entry “Cosmic Neighbours: Beauty and the Beast.”(Yijing Zhu and Xinghan Yang)

This week’s image is from another finalist in the Royal Observatory Greenwich’s annual ZWO Astronomy Photographer of the Year competition. The photo is labeled “Cosmic Neighbours: Beauty and the Beast” by photographers Yijing Zhu and Xinghan Yang. It was taken in Ürümqi, Xinjiang Uyghur Autonomous Region, China.

Here is a description of the photo from the photographers:

This image captures a dramatic cosmic pairing: the serene elegance of Bode’s Galaxy (M81, left) alongside the chaotic violence of the Cigar Galaxy (M82, right). Located about 12 million light years from Earth, these two neighbours are locked in a gravitational dance that has shaped their destinies profoundly. M81 retains its perfect grand design spiral form, a picture of galactic grace.  

In stark contrast, M82 is a starburst galaxy, reeling from a close encounter with its larger companion. This gravitational disturbance has triggered a furious burst of star formation at its core, which blasts into space spectacular red filaments of superheated hydrogen gas that are clearly visible in this deep exposure.

Pic of the Week: Fourth of July Colors

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Image (Credit): Images from NASA’s Chandra X-ray Observatory that provide a red, white, and blue version of the universe. (NASA/CXC/SAO)

If you are looking for some images for the upcoming Fourth of July celebrations, then this week’s pic will give you everything you need. The red, white, and blue of these images from the Chandra X-ray Observatory should put you in the right spirit.

The images from the top clockwise are Cassiopeia A, the ZwCl 0024+1652 galaxy cluster, spiral galaxy NGC 4736, and nebula NGC 3603. You can learn more about each of these images at this NASA site.

Happy Fourth of July!