Archiv: Neptun / Neptune (planet)


14.06.2023 - 12:50 [ Space.com ]

What Spacecraft Will Enter Interstellar Space Next?

(January 30, 2019)

This milestone — reaching interstellar space — can be considered leaving the solar system by a certain definition. Let‘s be clear about what that entails. In 1990, the New York Times reported that Pioneer was reported to leave the solar system when it flew past Neptune‘s orbit. That‘s not what Voyager 2‘s scientists used to make their determination, however. Instead, the more recent measurements consider the crossing of the sun‘s heliopause, the theoretical boundary to its heliosphere, to be the determining factor for entering interstellar space. The heliosphere is a bubble of charged particles created by and flowing past the sun. Scientists use it to mark where interstellar space begins.

14.06.2023 - 12:47 [ ORF.at ]

Raumsonde „Pioneer 10“ 40 Jahre aus Sonnensystem heraus

Am 13. Juni 1983 durchflog „Pioneer 10“ die Umlaufbahn des Neptun und wurde so laut NASA zum ersten menschengemachten Raumschiff, das am weitestentfernten bekannten Planeten unseres Sonnensystems vorbeiflog. Neptun ist im Mittel etwa 4,5 Milliarden Kilometer von der Sonne entfernt.

Mit „Pioneer 11“ und den beiden „Voyager“-Sonden folgten später ähnliche Missionen. „Voyager 1“ überholte „Pioneer 10“ schließlich als am weitesten von der Erde entferntes menschengemachtes Objekt. Zum bisher letzten Mal schickte „Pioneer 10“ im Jänner 2003 Daten, ein Kontaktversuch im März 2006 scheiterte.

28.03.2020 - 15:18 [ CNN ]

Scientists found a secret in old Voyager 2 data. This is why we need to revisit Uranus and Neptune

„The way in which the sun‘s solar wind interacts with Uranus is unlike any planet we‘ve ever explored,“ DiBraccio said. „We are left with questions regarding to what degree the solar wind affects dynamics at Uranus such as transporting atmospheric particles, transferring energy and even changing the planet‘s climate over time.“

26.08.2019 - 22:46 [ CNN ]

When Neptune got its stunning close-up: The Voyager 2 flyby, 30 years later

They discovered that Neptune‘s magnetic field was tipped on its side. They found a giant spot called the Great Dark Spot on the planet, similar to Jupiter‘s Great Red Spot. But the event was passing, because it was no longer there when the Hubble Space Telescope looked four years later.