International
Neptune’s delicate rings captured in new Webb image
AFP | by Daniel Lawler
The James Webb Space Telescope has turned its gaze away from the deep universe towards our home Solar System, capturing an image of a luminous Neptune and its delicate, dusty rings in detail not seen in decades, NASA said Wednesday.
The last time astronomers had such a clear view of the farthest planet from the Sun was when NASA’s Voyager 2 became the first and only space probe to fly past the ice giant for just a few hours in 1989.
Now Webb’s unprecedented infrared imaging capabilities has provided a new glimpse into Neptune’s atmosphere, said Mark McCaughrean, a senior advisor for science and exploration at the European Space Agency.
The telescope “takes all that glare and background away” so that “we can start to tease out the atmospheric composition” of the planet, McCaughrean, who has worked on the Webb project for more than 20 years, told AFP.
Neptune appears as deep blue in previous images taken by the Hubble Space Telescope due to methane in its atmosphere.
However the near-infrared wavelengths captured by Webb’s primary imager NIRCam shows the planet as a greyish white, with icy clouds streaking the surface.
“The rings are more reflective in the infrared,” McCaughrean said, “so they’re much easier to see”.
The image also shows an “intriguing brightness” near the top of Neptune, NASA said in a statement. Because the planet is tilted away from Earth and takes 164 years to orbit the Sun, astronomers have not yet had a good look at its north pole.
Webb also spotted seven of Neptune’s 14 known moons.
Strange moon
Looming over Neptune in a zoomed-out image is what appears to be a very bright spiky star, but is in fact Triton, Neptune’s strange, huge moon haloed with Webb’s famed diffraction spikes.
Triton, which is larger than dwarf planet Pluto, appears brighter than Neptune because it is covered in ice, which reflects light. Neptune meanwhile “absorbs most of the light falling on it”, McCaughrean said.
Because Triton orbits the wrong way around Neptune, it is believed to have once been an object from the nearby Kuiper belt which was captured in the planet’s orbit.
“So it’s a pretty cool to go and have a look at,” said McCaughrean.
As astronomers sweep the universe searching for other planets like our own, they have found that ice giants such as Neptune and Uranus are the most common in the Milky Way.
“By being able to look at these ones in great detail, we can key into our observations of other” ice giants,” McCaughrean said.
Operational since July, Webb is the most powerful space telescope ever built, and has already unleashed a raft of unprecedented data. Scientists are hopeful it will herald a new era of discovery.
Research based on Webb’s observations of both Neptune and Triton is expected in the next year.
“The kind of astronomy we’re seeing now was unimaginable five years ago,” McCaughrean said.
“Of course, we knew that it would do this, we built it to do this, it is exactly the machine we designed.
“But to suddenly start seeing things in these longer wavelengths, which were impossible before… it’s just absolutely remarkable.”
International
Uribe requests freedom amid appeal of historic bribery conviction
Former Colombian President Álvaro Uribe on Monday requested that the Supreme Court restore his freedom while he appeals the historic 12-year house arrest sentence he received for bribery and procedural fraud.
Uribe, the most prominent figure of Colombia’s right wing, was convicted last week by a lower court for attempting to bribe paramilitary members into denying his ties to the violent anti-guerrilla squads.
Since Friday, the 73-year-old has been under house arrest at his residence in Rionegro, about 30 km from Medellín. The judge justified the measure by citing a risk of flight.
However, Uribe’s defense team rejected that argument and formally petitioned the court to immediately lift the detention order, claiming it lacks legal basis.
Uribe, a dominant force in Colombian politics for decades, is now the first former president in the country’s history to be convicted and placed under arrest, found guilty of witness tampering and obstruction of justice to prevent links to paramilitary groups.
He has repeatedly denounced the trial as politically motivated, blaming pressure from the leftist government currently in power.
His political party, Centro Democrático, has called for nationwide protests on August 7 in support of Uribe, who remains popular for his hardline stance against guerrilla groups.
Uribe has until August 13 to submit his written appeal. The case will then move to the Bogotá High Court, which has until October 16 to uphold, overturn, or dismiss the sentence. If the deadline passes without a decision, the case will be archived.
International
U.S. Embassy staff restricted as gunfire erupts near compound in Port-au-Prince
The poorest country in Latin America and the Caribbean is currently engulfed in a deep political crisis and a wave of violence driven by armed groups — a situation that an international security mission led by Kenya is attempting to stabilize.
Due to the worsening security conditions, the U.S. government has suspended all official movements of embassy personnel outside the compound in Port-au-Prince, the U.S. State Department announced Monday in a security alert posted on social media platform X.
“There are intense gunfights in the Tabarre neighborhood, near the U.S. Embassy,” the alert reads, urging the public to avoid the area.
Tabarre is a municipality located near Port-au-Prince International Airport, northeast of the Haitian capital.
According to a July report by the UN High Commissioner for Human Rights, at least 3,141 people were killed in Haitibetween January 1 and June 30 of this year.
International
Israel says 136 food aid boxes airdropped into Gaza by six nations
The Israeli military announced on Sunday that 136 boxes of food aid were airdropped into Gaza by the United Arab Emirates, Jordan, Egypt, Germany, and Belgium.
“In recent hours, six countries conducted air drops of 136 aid packages containing food for residents in the southern and northern Gaza Strip,” read the statement, which added that the operation was coordinated by COGAT, the Israeli defense body overseeing civil affairs in the occupied Palestinian territories.
The Israeli military emphasized that they will “continue working to improve the humanitarian response alongside the international community” and reiterated their stance to “refute false allegations of deliberate famine in Gaza.”
The announcement comes as UN agencies warn Gaza faces an imminent risk of famine. More than one in three residents go days without eating, and other nutrition indicators have dropped to their worst levels since the conflict began.
The agencies also noted the difficulty of “collecting reliable data in current conditions, as Gaza’s health systems —already devastated by nearly three years of conflict— are collapsing.”
Meanwhile, Gaza’s Hamas-run Health Ministry reported on Sunday that hospitals in the enclave recorded six deaths from hunger and malnutrition on Saturday, all of them adults.
Uribe requests freedom amid appeal of historic bribery conviction
U.S. Embassy staff restricted as gunfire erupts near compound in Port-au-Prince
Israel says 136 food aid boxes airdropped into Gaza by six nations
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Uribe requests freedom amid appeal of historic bribery conviction