Explore

NASA Identifies Near-Earth Object as Comet, Impacting Planetary Defense Strategies

NASA Identifies Near-Earth Object as Comet, Impacting Planetary Defense Strategies

NASA's Jet Propulsion Laboratory has identified a near-Earth object, previously thought to be an asteroid, as a comet. The object, known as 1998 SH2, exhibited irregular motion, prompting further investigation. Using optical astrometry and powerful observatories, scientists confirmed the presence of a weak tail, indicating cometary activity. This discovery was made possible during the object's close approach to Earth in August 2025. The study, published in Nature Astronomy, highlights the importance of tracking near-Earth objects to distinguish between asteroids and comets, which can have different orbital behaviors due to outgassing.

Neptune's Extreme Winds Challenge Understanding of Planetary Weather

Neptune's Extreme Winds Challenge Understanding of Planetary Weather

Neptune, located 4.5 billion kilometers from the Sun, experiences winds exceeding 2,000 kilometers per hour, despite receiving only a fraction of the sunlight Earth does. This phenomenon makes Neptune a unique subject for studying planetary weather. The planet emits more energy than it absorbs from the Sun, suggesting internal heat plays a significant role in driving its weather patterns. Rapid rotation and atmospheric dynamics further contribute to the formation of powerful east-west jets. However, the exact mechanisms behind these extreme winds remain a topic of scientific inquiry.

Why Kepler-452b Became a Top Target for SETI

Why Kepler-452b Became a Top Target for SETI

Kepler-452b, often referred to as Earth's cousin, is a fascinating exoplanet candidate discovered by the Kepler space telescope. Located approximat...

NASA's New Horizons Spacecraft Resumes Mission Beyond Pluto After Hibernation

NASA's New Horizons Spacecraft Resumes Mission Beyond Pluto After Hibernation

NASA's New Horizons spacecraft has been reactivated after a 321-day hibernation period at the edge of the solar system. According to NASA, the spacecraft is in 'good health' and has begun transmitting scientific data again. New Horizons, which launched in 2006, is on a mission to study the boundary where the sun's influence ends and interstellar space begins. The spacecraft is currently about 5.9 billion miles from Earth, making it one of the farthest working spacecraft in the universe. It is on a trajectory toward the heliopause, the outer edge of the sun's influence, where it will collect detailed data with its sensitive instruments.

Geologists Suggest Milky Way's Structure Influenced Earth's Continental Formation

Geologists Suggest Milky Way's Structure Influenced Earth's Continental Formation

A team of geologists led by Chris Kirkland from Curtin University proposes that the formation of Earth's continents may have been influenced by the Solar System's passage through the Milky Way's spiral arms. As the Solar System orbits the galaxy, it encounters denser regions where gas and dust accumulate, potentially dislodging objects from the Oort Cloud and sending them towards the inner Solar System as comets. These impacts could have contributed to the creation of the first stable fragments of continental crust. The researchers base their hypothesis on recurring shifts in zircon hafnium isotopes and changes in zircon oxygen-isotope distributions across several Archean cratons, which align with predicted spiral-arm passages.

NASA Confirms Near-Earth Asteroid is Actually a Comet, Revealing New Insights

NASA Confirms Near-Earth Asteroid is Actually a Comet, Revealing New Insights

NASA has confirmed that a near-Earth object, previously thought to be an asteroid, is actually a comet. The object, known as 1998 SH2, was discovered in 1998 and tracked until 2016. Recent observations revealed that it is leaking gas, which has caused it to deviate from its expected orbit. This discovery was made possible by the detection of a faint tail, which was captured by several large telescopes, including the Canada-France-Hawaii Telescope and the European Southern Observatory's Very Large Telescope. The comet, now designated as P/1998 SH2, is the first to be identified through perturbations in its motion before being confirmed by imaging.

Chandrasekhar's Struggle with Eddington Over White Dwarf Theory

Chandrasekhar's Struggle with Eddington Over White Dwarf Theory

In 1935, Subrahmanyan Chandrasekhar presented his theory on the maximum mass of white dwarfs at the Royal Astronomical Society, only to face public criticism from Sir Arthur Eddington. Eddington, a leading astronomer, dismissed Chandrasekhar's findings, arguing against the possibility of stars collapsing under their own gravity. Despite private support from physicists like Bohr and Dirac, Eddington's influence in astronomy overshadowed Chandrasekhar's work, leading to years of professional struggle for the young scientist.

NASA's Parker Solar Probe Achieves Record Speed in Sun's Outer Atmosphere

NASA's Parker Solar Probe Achieves Record Speed in Sun's Outer Atmosphere

NASA's Parker Solar Probe has set a new speed record by traveling through the Sun's outer atmosphere, known as the corona, at approximately 692,000 kilometers per hour. This achievement marks the fastest speed ever reached by a human-made object. The probe completed its 28th close approach to the Sun on June 8, 2026, following a tightly drawn elliptical orbit. The speed record was achieved during the perihelion, the closest point in its orbit to the Sun. The Parker Solar Probe's mission involves studying the Sun's corona to understand how it is heated and how the solar wind accelerates. The probe's trajectory was made possible by seven flybys of Venus, which helped adjust its orbit for closer approaches to the Sun.

Astrophysicist Becky Smethurst Explores the Enigma of Supermassive Black Hole Growth

Astrophysicist Becky Smethurst Explores the Enigma of Supermassive Black Hole Growth

Astrophysicist Becky Smethurst from the University of Oxford discusses the mystery of how supermassive black holes grow to such enormous sizes. Despite being a central feature of galaxies, the mechanisms behind their rapid growth remain unclear. Smethurst's research focuses on the impact of these massive entities on their surrounding galaxies and the potential processes that contribute to their size. The discussion highlights the challenges in understanding the physics of black holes, which often defy conventional scientific laws, and the ongoing efforts to unravel these cosmic mysteries.

Amateur Astronomer Discovers Ancient Meteorite Crater in Canada Using Google Maps

Amateur Astronomer Discovers Ancient Meteorite Crater in Canada Using Google Maps

An amateur astronomer from Quebec, Joël Lapointe, has potentially discovered one of the largest meteorite impact craters in recent years using Google Maps. While planning a trip through the Côte-Nord region, Lapointe noticed a circular depression resembling a meteorite crater. The formation, approximately 15.5 miles across, is located about 62 miles north of Magpie. After failing to find it in existing crater databases, Lapointe contacted researchers, leading to an investigation that confirmed the structure as a meteorite impact site. Named Uhackatik, the crater is believed to have been formed by a meteorite impact around 390 million years ago. Researchers plan to present their findings at the Meteoritical Society's Annual Meeting in Germany.

NASA Highlights Perseids Meteor Shower as Summer's Celestial Event

NASA Highlights Perseids Meteor Shower as Summer's Celestial Event

The Perseids meteor shower, an annual astronomical event, is set to illuminate the night sky from July 17 to August 23, with its peak expected between August 12 and 13. According to NASA, the Perseids are renowned for their bright and swift meteors, capable of producing between 50 and 100 visible meteors per hour under optimal conditions. These meteors originate from the debris left by the comet Swift-Tuttle, which orbits the sun every 133 years. The shower is best viewed from the Northern Hemisphere, particularly in the predawn hours, although it can be seen throughout the evening. The Perseids are also noted for their fireballs, which are larger explosions of light and color that last longer than typical meteor streaks.

Perseid Meteor Shower: A Journey of Cosmic Debris

Perseid Meteor Shower: A Journey of Cosmic Debris

The Perseid meteor shower, one of the most anticipated celestial events, is currently active, with its peak expected on August 13. The meteors originate from the debris of Comet Swift-Tuttle, which travels between the outer and inner solar system. As Earth passes through the comet's debris stream, the meteors create a spectacular display in the night sky. This annual event offers a unique opportunity for stargazers to witness the fiery demise of cosmic particles.