Professor Loeb is Not Convinced by NASA Statements About 3I/ATLAS

Posted on by onespaceman2000
Image (Credit): October 2, 2025 image of comet 3I/ATLAS as captured by the High Resolution Imaging Science Experiment (HiRISE) camera aboard NASA’s Mars Reconnaissance Orbiter. (NASA/JPL-Caltech/University of Arizona)

Harvard Professor Avi Loeb is not satisfied with NASA’s comments this week that the interstellar object streaming through our Solar System is a normal comet.

In his blog, Professor Loeb stated:

NASA’s representatives should have emphasized what we do not understand about 3I/ATLAS rather than insist that it is a familiar comet from a new birth environment…We should not “judge a book by its cover,” because we all know about the Trojan Horse which appeared unthreatening to the guardians of the City of Troy. When monitoring an interstellar visitor, we should not fall prey to traditional thinking but scrutinize new interpretations. The public resonates with science as a learning experience, where the collection of evidence leads the way to new knowledge rather than reinforces variants on past knowledge.

Trojan Horse? That is certainly an alarming way of looking at this foreign object. Professor Loeb is not backing down one bit on his concerns, and refers back to his 12 puzzles, one of them being:

Its nucleus is about a million times more massive than 1I/`Oumuamua, an interstellar object discovered in 2017, and a thousand times more massive than 2I/Borisov, discovered in 2019, while moving faster than both, altogether with a likelihood of less than 0.1 per cent (see here and here). This suggests that it may have targeted the inner solar system rather than being drawn from the reservoir of icy rocks.

Again, using terms like “targeted” is certainly garnering a lot of interest by outside observers.

Maybe this will be settled next month with new images. Or maybe this will be a continuing controversy. Even if it goes nowhere, I think we can expect another book from Professor Loeb.

Pic of the Week: Wolf-Rayet Apep

Posted on by onespaceman2000
Image (Credit): Dust spirals surrounding Wolf-Rayet Apep, as captured by the JWST. (NASA, ESA, CSA, STScI, Y. Han (Caltech), R. White (Macquarie University), A. Pagan (STScI))

This week’s embryonic image comes from the James Webb Space Telescope (JWST). It shows what NASA calls “four serpentine spirals of dust” around a pair of Wolf-Rayet stars. Such stars are rare, with NASA estimating that only a thousand can be found in our galaxy consisting of hundreds of billions of stars. And binary Wolf-Rayet stars are even rarer.

NASA notes that the JWST, or Webb, provided a much better image of the spiraling dust:

Observations taken prior to Webb only detected one shell, and while the existence of outer shells was hypothesized, searches using ground-based telescopes were unable to uncover any. These shells were emitted over the last 700 years by two aging Wolf-Rayet stars in a system known as Apep, a nod to the Egyptian god of chaos...Webb also confirmed that there are three stars gravitationally bound to one another in this system. The dust ejected by the two Wolf-Rayet stars is “slashed” by a third star, a massive supergiant, which carves holes into each expanding cloud of dust from its wider orbit. (All three stars are shown as a single bright point of light in Webb’s image.)

Video: Cool Worlds Discusses Interstellar Comet 3I/ATLAS 

Posted on by onespaceman2000

With all the ongoing stories about interstellar comet 3I/ATLAS, you may enjoy an earlier video from Cool World Labs titled “Could 3I/ATLAS Be Technological?” Columbia University Associate Professor David Kipping looks at the claims by Harvard Professor Avi Loeb that the comet is not only from another solar system, but it may in fact be a spacecraft.

Professor Kipping focuses his discussion on an earlier paper by Professor Loeb titled Is the Interstellar Object 3I/Atlas Alien Technology? The points discussed in the video are broken down into three categories: (1) trajectory, (2) speed, and (3) excessive size. In each case, he provides plenty of technical points, but the main point seems to be that the evidence is often arbitrary or contradictory. Professor Kipping also notes those occasions where the paper goes “off the rails” to make the idea of a spacecraft possible.

All of these points continue to bounce around as we learn more about the comet, but it is interesting to see the scientific community represented here by Professor Kipping doing a great job of parsing the evidence while keeping all of it professional. He made it clear throughout the video that he has great respect for Professor Loeb’s work over the years, even if this particular theory about a spacecraft does not seem plausible.

Check it out for yourself.

Astronomy Question: The Asteroid Belt

Posted on by onespaceman2000
Image (Credit): Asteroid 433 Eros, which is the first asteroid ever orbited by a spacecraft, Near Earth Asteroid Rendezvous – Shoemaker (NEAR Shoemaker), in 1998. (NASA)

Multiple Choice: What is the average distance between the asteroids located in the asteroid belt between Mars and Jupiter?

A. 4,000 miles
B. 50,000 miles
C. 600,000 miles
D. 1.1 million miles

Take a guess and then check your answer by going to the “Astronomy Question Answer Sheet” page.

Space Stories: Threat to Chinese Space Station, Solar Storms on the ISS, and Dream Chaser Prep Continues

Posted on by onespaceman2000
Credit: Image by Clker-Free-Vector-Images from Pixabay

Here are some recent space-related stories of interest.

—Time: “China’s Imperiled Astronauts Illustrate the Dangers of Space Debris“

No trip to space can be counted a success unless you make it safely back to Earth…And it’s a lesson that was learned anew this week by the taikonauts—Chinese astronauts—Chen Dong, Chen Zhongrui, and Wang Jie. The trio arrived at China’s Tiangong Space Station aboard their Shenzhou-20 spacecraft on April 24, and were set to come home on Nov. 5, handing the keys to the station over to the three-person crew of Shenzhou-21, who arrived on Oct. 31. But that was not to be. Not long before Shenzhou-20 was set to carry the three home it was struck by a piece of space debris, leaving cracks in one of its windows. That can be deadly in a spacecraft that is supposed to remain airtight both in the vacuum of space and in the steadily thickening atmosphere as it returns to Earth.

—Yahoo News: “Russian Cosmonauts Take Shelter on International Space Station During Severe Solar Storm“

A powerful geomagnetic storm that dazzled skywatchers across the Northern Hemisphere earlier this month also affected life aboard the International Space Station (ISS). During the Nov. 11-12 solar storm, Russian cosmonauts temporarily relocated their sleeping quarters as a precaution against increased radiation exposure, NASA confirmed.

—Space News: “Dream Chaser Completes Key Tests Ahead of First Flight“

Sierra Space has completed key testing milestones for its Dream Chaser vehicle as the company explores both civil and national security missions for the spaceplane. The company announced Nov. 13 that the first Dream Chaser vehicle, Tenacity, completed electromagnetic interference and compatibility testing at NASA’s Kennedy Space Center...While Sierra Space is emphasizing national security uses, the company is keeping open the option of using Dream Chaser to support the ISS or future commercial space stations, known as commercial low Earth orbit destinations, or CLDs.