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Ancient Jupiter was roughly twice as large with a 50× stronger magnetic field
science4 days ago

Ancient Jupiter was roughly twice as large with a 50× stronger magnetic field

A 2025 Nature Astronomy study using the orbits of Jovian moons Amalthea and Thebe suggests Jupiter was about 2–2.5× its current size and had a magnetic field roughly 50× stronger shortly after the solar system formed (about 3.8 million years in). The stronger early convection would have produced a much larger magnetosphere; the authors infer these conditions from angular-momentum constraints rather than modeling formation directly. The article notes that a separate, older estimate of Jupiter’s current contraction rate (~2 cm/year) exists but is not measured by this study. This finding provides a benchmark for constraining the solar system’s early history.

via Space Daily|
#amalthea#early-solar-system#jupiter
Jupiter’s 1994 Comet Shower: A Turning Point for Space Observation and Defense
space7 days ago

Jupiter’s 1994 Comet Shower: A Turning Point for Space Observation and Defense

In July 1994, 21 fragments of Comet Shoemaker-Levy 9 slammed into Jupiter over six days, marking the first direct observation of a collision between solar-system bodies. Triggered by Brian Marsden’s 1993 orbital prediction, a coordinated global observing effort captured unprecedented data (Hubble, Galileo, Ulysses, Voyager 2) and revealed an enormous energy release (about 40 million megatons total; fragment G ~6 million megatons) that left a 12,000-km scar. The event reshaped space policy, leading to NASA’s Spaceguard Survey in 1998 to catalog near-Earth asteroids and informing modern planetary-defense efforts such as the 2022 DART mission; it also cemented Eugene Shoemaker’s legacy in lunar exploration.

via Space Daily|
#comet#jupiter#planetary-defense
Europa's Buried Ocean: Galileo’s Point Sparks a Vast Subsurface Sea
science7 days ago

Europa's Buried Ocean: Galileo’s Point Sparks a Vast Subsurface Sea

From Galileo's 1610 sighting of a tiny moon near Jupiter, scientists now consider Europa to host a global salty ocean buried under kilometers of ice, potentially larger than Earth's oceans. Magnetic data and surface geology suggest a 60–150 km-deep ocean under a 15–25 km ice shell, but no direct samples exist yet. NASA's Europa Clipper will study the ice shell, ocean, and chemistry to assess habitability without drilling through the ice or directly seeking life.

via Space Daily|
#europa#europa-clipper#ice-shell
Retro Game Boy Camera Captures Jupiter Through Giant Telescope
technology14 days ago

Retro Game Boy Camera Captures Jupiter Through Giant Telescope

An artist-musician attached a modified 1998 Game Boy Camera to Mount Wilson Observatory's 60-inch telescope using a 3D-printed C‑Mount adapter and eyepiece adapters, effectively turning the telescope into a roughly 730,000mm-long lens (about 24,384mm equivalent) to photograph Jupiter after a Moon shot proved too close. The shot revealed Jupiter’s bands and limb, and the image was printed on a Game Boy printer. The creator, Chris Graue, is known for past game‑console hacks and plans to continue experimenting during his Alaska tour with Lo(u)ser.

via PetaPixel|
#3dprinting#astrophotography#gameboycamera
Moon-Jupiter Alignment Sparks Abundance for Four Signs on June 26
horoscope15 days ago

Moon-Jupiter Alignment Sparks Abundance for Four Signs on June 26

On Friday, June 26, 2026, the Moon moves into Sagittarius while Jupiter resides in Cancer, amplifying emotions and luck. The celestial setup is said to boost abundance for four signs—Sagittarius, Cancer, Capricorn, and Pisces—each receiving a nudge to act: Sagittarians should embrace their authentic self and take risks; Cancers are driven to pursue growth, health, and new steps; Capricorns should release negativity to attract the right people and opportunities; and Pisces may enjoy romance and generosity as they follow their passions. The synergy relies on Jupiter’s exaltation in Cancer and the Moon’s emotional influence guiding favorable outcomes.

via YourTango|
#abundance#astrology#horoscope
Europa's Fresh Surface Hints at a Hidden Ocean
space18 days ago

Europa's Fresh Surface Hints at a Hidden Ocean

Europa’s surface is unusually crater-free, implying a young, constantly renewed ice crust. Tidal heating from Jupiter sustains internal warmth, likely keeping a global salty ocean beneath the ice; ridges, chaos terrain and possible plumes point to ongoing resurfacing that erases craters. The Europa Clipper and ESA’s JUICE missions will map the ice and probe for direct ocean evidence to test these ideas.

via Space Daily|
#europa#icy-moon#jupiter
Crescent Moon Sparks Evening Triangle with Mercury and Jupiter
space24 days ago

Crescent Moon Sparks Evening Triangle with Mercury and Jupiter

On June 16, a waxing crescent Moon forms an elongated triangle with Jupiter and Mercury in the western evening sky. Mercury’s greatest eastern elongation was yesterday, and the Moon passes 3° north of Mercury around 4 PM EDT; after sunset the trio rises to about 10° high, with Pollux nearby. Venus sits above Jupiter to the upper left, and the Moon (about 6% illuminated) will occult Venus in daylight tomorrow afternoon. Sunrise is 5:31 AM and sunset 8:31 PM at 40°N, 90°W.

via Astronomy Magazine|
#astronomy#evening-sky#jupiter
Thirty Days of Twilight: Venus and Jupiter’s Kolkata Conjunction Collage
space-exploration27 days ago

Thirty Days of Twilight: Venus and Jupiter’s Kolkata Conjunction Collage

Space photographer Soumyadeep Mukherjee compiled a 30-image collage titled “Closer, Everyday,” capturing the apparent approach of Venus and Jupiter in Kolkata’s western sky from May 11 to June 9, using a Nikon Z6II and Sigma 50mm lens across civil, nautical, and astronomical twilight. The composite shows the two planets moving closer in Earth’s sky, culminating in a near-conjunction on June 9 (less than 2 degrees apart), while acknowledging that Venus is actually receding in three-dimensional space. The piece highlights the consistent gear and timing across days and suggests readers explore astrophotography gear and skywatching opportunities.

via Space|
#astrophotography#conjunction#jupiter
Twilight Trio: Mercury, Venus and Jupiter Create Brief 3-Planet Parade
space29 days ago

Twilight Trio: Mercury, Venus and Jupiter Create Brief 3-Planet Parade

Mercury, Venus and Jupiter align low in the western sky just after sunset on June 12 for a brief, visually striking 'planetary parade' that lasts about 30–45 minutes. Venus will be the brightest at first, followed by Mercury and Jupiter as they drift away from the sun. Telescopes can reveal Mercury’s half‑moon and Venus’s gibbous disk, while Jupiter may show cloud belts. For photographers, a wide‑angle lens framing the trio over a landscape (mountains, city skyline, or trees) makes for a dramatic twilight image.

via Space|
#jupiter#mercury#planetary-parade
Two Lost Ice Giants May Have Shaped the Early Solar System
space1 month ago

Two Lost Ice Giants May Have Shaped the Early Solar System

A new study based on 122 simulations suggests the early outer solar system may have hosted two additional ice-giant planets with masses between Earth and Neptune that were later ejected. Depending on whether the system started with five or six giants, Jupiter’s moons remained stable in the presence of two extra ice giants, while Uranus’s moons stayed stable with only one extra; Miranda’s ice content hints at past moon collisions. The findings imply a far bardziej crowded infancy for the solar system than previously thought, and the team notes further simulations are needed to pin down the exact number and masses of the missing planets. The work was published online in Icarus (2026).

via Live Science|
#giant-planets#ice-giants#jupiter