Laurence Tognetti, Author at Universe Today

July 27, 2023July 28, 2023 by Laurence Tognetti

Have We Seen the First Glimpse of Supermassive Dark Stars?

Three dark star candidates, JADES-GS-z13-0 (top), JADES-GS-z12-0 (middle), and JADES-GS-z11-0 (bottom) were originally identified as galaxies by the JWST Advanced Deep Extragalactic Survey (JADES) team. Recently, a team of researchers have hypothesized these candidates could be “dark stars,” which are theoretical objects far more massive and brighter than our sun, and allegedly powered by demolishing particles of dark matter. (Credit: NASA/European Space Agency)

A recent study published in the Proceedings of the National Academy of Sciences (PNAS) examines what are known as dark stars, which are estimated to be much larger than our Sun, are hypothesized to have existed in the early universe, and are allegedly powered by the demolition of dark matter particles. This study was conducted using spectroscopic analysis from NASA’s James Webb Space Telescope (JWST), and more specifically, the JWST Advanced Deep Extragalactic Survey (JADES), and holds the potential to help astronomers better understand dark stars and the purpose of dark matter, the latter of which continues to be an enigma for the scientific community, as well as how it could have contributed to the early universe.

July 24, 2023July 25, 2023 by Laurence Tognetti

There Could be Trillions of Rogue Planets Wandering the Milky Way

Artist's rendition of an ice-encrusted, Earth-mass rogue planet free-floating through space. (Credit: NASA’s Goddard Space Flight Center)

A pair of new studies set to be published in The Astronomical Journal examine new discoveries in the field of rogue planets, which are free-floating exoplanets that drift through space unbound by the gravitational tug of a star. They can form within their own solar system and get ejected, or they can form independently, as well. The first study examines only the second discovery of an Earth-mass rogue planet—the first being discovered in September 2020—while the second study examines the potential number of rogue planets that could exist in our Milky Way Galaxy.

July 22, 2023July 22, 2023 by Laurence Tognetti

NASA Astronauts Get a New Ride at Kennedy Space Center

NASA’s new custom-designed, fully electric, environmentally friendly crew transportation vehicles for the upcoming Artemis missions, which were delivered to NASA’s Kennedy Space Center on July 11, 2023. These new vehicles will ferry Artemis astronauts to Launch Complex 39B for their missions beginning with Artemis II, and were delivered by the manufacturer, Canoo Technologies Inc. (Credit: NASA/Isaac Watson)

In its continued support for the Artemis missions, a three fully-electric, environmentally friendly, and specially designed vehicles were recently delivered to NASA for the purpose of ferrying future Artemis astronauts from their crew quarters to historic Launch Pad 39B before their journey to the Moon. The vehicles were built and delivered by Canoo Technologies Inc. based in Torrance, California, and comes just over a year after NASA awarded Canoo the contract to provide the new vehicles, and almost two years since NASA put out a call for proposals.

July 17, 2023July 17, 2023 by Laurence Tognetti

NASA Artemis DIMPLE Instrument Suite to Explore Moon’s Mysterious Volcanic Features

NASA recently selected a new science payload that will travel to the Moon through a series of robotic missions via the agency’s Artemis program. This instrument suite, known as the Dating an Irregular Mare Patch with a Lunar Explorer (DIMPLE), will have the task of studying the Ina Irregular Mare Patch, also known as Ina, which is a small depression that could provide insights into the Moon’s volcanic history. It was discovered using orbital images from the Apollo 15 crew, and despite several past studies, its origin remains unclear.

July 16, 2023July 16, 2023 by Laurence Tognetti

India Launches Chandrayaan-3 to the Moon, Hoping for a Successful Landing

The Chandrayaan-3 spacecraft lifting off for the Moon from the Satish Dhawan Space Center on July 14, 2023. (Credit: Indian Space Resource Organisation (ISRO))

On July 14, 2023, at 2:35 pm Indian Standard Time (5:05 am EST), the Indian Space Resource Organisation (ISRO) successfully launched their Chandrayaan-3 spacecraft from the Satish Dhawan Space Center, which is the primary spaceport of the ISRO. The goal of the mission is to put India’s first lander (Vikram) and rover (Pragyan) on the lunar surface and is scheduled to touch down on the Moon on August 23, 2023. This mission comes after the ISRO’s Chandrayaan-2 Vikram lander crashed on the Moon on September 6, 2019, due to a last-minute guidance software glitch. While the ISRO indicated everything was going according to plan, they unexpectedly lost contact with the Vikram lander approximately 2.1 kilometers (1.3 miles) above the lunar surface.

July 15, 2023July 15, 2023 by Laurence Tognetti

Some Star Systems Create a Planet Sandwich

Artist rendition of the new “sandwiched planet formation” theory examined for this study. (Credit: University of Warwick/Mark A. Garlick; License Type: Attribution (CC BY 4.0))

A recent study presented at the National Astronomy Meeting 2023 (NAM2023) examines a newly discovered planetary formation theory that challenges previous notions on how planets are formed in the disks of gas and dust surrounding young stars, also known as protoplanetary disks. Along with being presented at NAM2023, the study has also been submitted for peer-review to the journal Monthly Notices of the Royal Astronomical Society and holds the potential to help scientists better understand not only how planets form, but how life could form on them, as well.

July 13, 2023July 13, 2023 by Laurence Tognetti

Volcanic Hotspot Found on the Moon

Arrow displaying position of the batholith on the farside of the Moon (left) with the heat gradient from the granite within the Compton-Belkovich Thorium Anomaly (center and right). (Credit: Matthew Siegler, PSI)

A recent study published in Nature examines a volcanic hotspot that potentially exists beneath a feature on the Moon’s farside (the side facing away from the Earth) called the Compton-Belkovich Thorium Anomaly. Researchers led by the Planetary Science Institute collected data from the hotspot region using microwave instruments onboard the China National Space Administration’s Chang’e-1 and Chang’e-2 orbiters and holds the potential to help scientists better understand the past volcanic processes on our nearest celestial neighbor, as surface evidence indicates lunar volcanic activity ceased between 3 to 4 billion years ago.

June 30, 2023July 1, 2023 by Laurence Tognetti

Psyche Mission Passes Independent Review Board with Flying Colors

Image of NASA engineers preparing the Psyche spacecraft for launch within a clean room at the Astrotech Space Operations Facility located near the NASA Kennedy Space Center. Psyche is scheduled to launch in October 2023 on a SpaceX Falcon Heavy rocket from historic Launch Complex 39A at Kennedy. (Credit: NASA/Ben Smegelsky)

An independently appointed review board recently announced that NASA, their Jet Propulsion Laboratory (JPL), and the California Institute of Technology (Caltech) have exceeded expectations in taking steps to ensure the successful launch of the metal-rich-asteroid-hunting Psyche mission this October. This comes after Psyche’s initial launch date was delayed from August 2022 due to late delivery of the spacecraft’s flight software and testing equipment, which prevented engineers from performing the necessary checkouts prior to launch.

June 30, 2023July 1, 2023 by Laurence Tognetti

Melting Water in Mars’ Past Could Have Created Martian Gullies

Image of gullies in Terra Sirenum on Mars taken by the High Resolution Imaging Science Experiment (HiRISE) camera onboard NASA's Mars Reconnaissance Orbiter. (Credit: NASA/JPL/University of Arizona)

A recent study published in Science examines how thin channels inside impact craters on Mars could have formed from Martian gullies, which share similar characteristics with gullies on Earth and are typically formed from cascading meltwater, despite the Martian atmosphere being incapable of supporting liquid water on its surface. However, the researchers hypothesize these gullies could have formed during periods of high obliquity, also known as axial tilt, on Mars, which could have resulted in a brief rise in surface temperatures that could have melted some surface and subsurface ice, leading to meltwater cascading down the sides of impact craters across the planet.

June 29, 2023June 30, 2023 by Laurence Tognetti

NASA’s HiRISE Camera Recently Imaged a Martian Dust Devil. But Why Study Them?

A recent dust devil on Mars captured by NASA's High Resolution Imaging Experiment (HiRISE) camera. (Credit: NASA/JPL-Caltech/UArizona)

NASA recently used its powerful High Resolution Imaging Experiment (HiRISE) camera onboard the Mars Reconnaissance Orbiter to take a breathtaking image of a dust devil traversing Syria Planum on Mars. One unique aspect of dust devils is their shadows can be used to estimate their height, which have been estimated to reach 20 km (12 miles) into the Martian sky. Studying dust devils on Mars is a regular occurrence for the scientific community and can help scientists better understand surface processes on other planets. But with the atmospheric pressure on Mars being only a fraction of Earth’s, what processes are responsible for producing dust devils?