(April 16, 2016)
In this paper, we focus on the effects of stellar rotation on the evolution of the planetary orbit and on the impact of the changes of the planetary orbit on the rotation of the star.
Archiv: Orbit / Umlaufbahnen (Weltraumobjekte) / orbits (of space objects)
NASA Shows Einstein Was Right: Our Sun Is Losing Mass – and Its Grip on Our Solar System
(January 19, 2018)
As our sun gets older, it‘s losing mass, and so its gravitational pull becomes weaker. As a result, the orbits of all the planets in our solar system are expanding, not unlike „the waistband of a couch potato in midlife,“ according to a new NASA press statement.
A team of researchers from the Massachusetts Institute of Technology, the University of Maryland and the NASA Goddard Space Flight Center has shown that the aging sun is behaving according to Albert Einstein‘s theory of general relativity.
Like humans, our Sun loses mass as it ages, weakening its gravitational pull. To study the dynamics of our aging star, @NASASun researchers have enlisted Mercury, the smallest, innermost planet in the solar system.
(January 19, 2018)
To study the dynamics of our aging star, @NASASun researchers have enlisted Mercury, the smallest, innermost planet in the solar system. See how: go.nasa.gov/2DsuhTT
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.
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.
Ancient shell shows days were half-hour shorter 70 million years ago
(March 9, 2020)
The length of a year has been constant over Earth‘s history, because Earth‘s orbit around the Sun does not change.
NASA Team Studies Middle-aged Sun by Tracking Motion of Mercury
(18.01.2018)
Like the waistband of a couch potato in midlife, the orbits of planets in our solar system are expanding. It happens because the Sun’s gravitational grip gradually weakens as our star ages and loses mass.
Earth Is Drifting Away From The Sun, And So Are All The Planets
(Jan 3, 2019)
Deep inside the Sun, the process of nuclear fusion occurs. Every second, the Sun emits some 3.846 × 1026 joules of energy, which are released via the conversion of mass into energy in the core. Einstein‘s E = mc2 is the root cause, nuclear fusion is the process, and the continuous emission of energy from the Sun is the result. This energy is the underlying process that powers practically every biologically interesting process occurring on Earth.
Der Sternenhimmel gehört uns allen – und nicht Elon Musk und Jeff Bezos
Bislang sendet die deutsche Politik das falsche Signal: Anstatt Sternenhimmel, Wissenschaft und den Zugang zum Weltall zu schützen, fördert sie den Zugang zum Satelliteninternet, um die Löcher in der deutschen Breitbandlandschaft zu stopfen.
Chinesische Weltraumrakete: USA planen keinen Abschuss
„Wir können eine Menge Dinge tun, aber wir haben derzeit keinen Plan, sie abzuschießen“, sagte Verteidigungsminister Lloyd Austin gestern. Mit dem Absturz rechnet das Pentagon morgen oder am Sonntag. Eine exakte Absturzstelle sei schwer vorherzusagen.
In Earth‘s early history, a day was 23.5 hours and a year lasted 372 days
(13.03.2020)
We‘ve long known that an Earth day lasts 24 hours, and that remains constant because Earth‘s trip around the sun doesn‘t vary.
However, the number of days that make an Earth year have shifted and shortened because days have grown longer. That is thanks to the moon‘s gravity, which draws on ocean‘s tides and slows Earth‘s rate of rotation.
Eine Schaltsekunde mehr Zeit
(30.12.2008)
Wie unregelmäßig sich die Erde dreht, sieht man daran, dass zwischen 1999 und 2006 sieben Jahre vergehen mussten, bis eine Schaltsekunde nötig wurde; diesmal sind es nur drei Jahre.
On-Time Earth Baffles Scientists
(31. März 2003)
To make the world’s official time agree with where the Earth actually is in space, scientists in 1972 started adding an extra „leap second“ on the last day of the year.
For 28 years, scientists repeated the procedure. But in 1999, they discovered the Earth was no longer lagging behind.
At the National Institute for Science and Technology in Boulder, spokesman Fred McGehan said most scientists agree the Earth’s orbit around the sun has been gradually slowing for millennia. But he said they don’t have a good explanation for why it’s suddenly on schedule.
NASA Shows Einstein Was Right: Our Sun Is Losing Mass – and Its Grip on Our Solar System
(19.01.2018)
As our sun gets older, it‘s losing mass, and so its gravitational pull becomes weaker. As a result, the orbits of all the planets in our solar system are expanding, not unlike „the waistband of a couch potato in midlife,“ according to a new NASA press statement.
A team of researchers from the Massachusetts Institute of Technology, the University of Maryland and the NASA Goddard Space Flight Center has shown that the aging sun is behaving according to Albert Einstein‘s theory of general relativity.
NASA Team Studies Middle-aged Sun by Tracking Motion of Mercury
(18.01.2018)
Like the waistband of a couch potato in midlife, the orbits of planets in our solar system are expanding. It happens because the Sun’s gravitational grip gradually weakens as our star ages and loses mass.
The Orbits Of All The Planets In Our Solar System Are Expanding As The Sun Gets Older, Study On Mercury’s Orbit Reveals
(25.01.2018)
“Mercury is the perfect test object for these experiments because it is so sensitive to the gravitational effect and activity of the Sun,” explained Antonio Genova, the lead author of the study and a MIT researcher working at NASA’s Goddard Space Flight Center.
Researchers were able to make these calculations from the data gathered by NASA’s MESSENGER spacecraft which made three ‘flybys’ of Mercury in 2008 and 2009 and orbited Mercury between March 2011 and April 2015 before it crashed into Mercury in 2015, Mail noted.
Komet mit freiem Auge sichtbar
Derzeit zieht der Komet Neowise an der Erde vorbei. Er kommt unserem Planeten so nah, dass er und sein Schweif mit bloßem Auge sichtbar ist.
There’s a lot to spot in the sky this month. Turn an eye upwards to find:
The Northern Hemisphere’s #SummerSolstice in full swing
The Summer Triangle of stars in the East
Morning planetary views of Mars, Jupiter & Venus
And more!
NASA Team Studies Middle-aged Sun by Tracking Motion of Mercury
(18.01.2018)
Like the waistband of a couch potato in midlife, the orbits of planets in our solar system are expanding. It happens because the Sun’s gravitational grip gradually weakens as our star ages and loses mass.
NASA Shows Einstein Was Right: Our Sun Is Losing Mass—and Its Grip on Our Solar System
(19.01.2018)
As our sun gets older, it’s losing mass, and so its gravitational pull becomes weaker. As a result, the orbits of all the planets in our solar system are expanding, not unlike „the waistband of a couch potato in midlife,“ according to a new NASA press statement.
A team of researchers from the Massachusetts Institute of Technology, the University of Maryland and the NASA Goddard Space Flight Center has shown that the aging sun is behaving according to Albert Einstein’s theory of general relativity.
On-Time Earth Baffles Scientists
(31. März 2003)
To make the world’s official time agree with where the Earth actually is in space, scientists in 1972 started adding an extra „leap second“ on the last day of the year.
For 28 years, scientists repeated the procedure. But in 1999, they discovered the Earth was no longer lagging behind.
At the National Institute for Science and Technology in Boulder, spokesman Fred McGehan said most scientists agree the Earth’s orbit around the sun has been gradually slowing for millennia. But he said they don’t have a good explanation for why it’s suddenly on schedule.
In Earth‘s early history, a day was 23.5 hours and a year lasted 372 days
(today)
We‘ve long known that an Earth day lasts 24 hours, and that remains constant because Earth‘s trip around the sun doesn‘t vary.
‚Mini-moon‘ the size of a car discovered orbiting Earth. But it won‘t be there for long.
After billions of years, it looks like the moon found some temporary company in the form of a „mini-moon“ that recently entered the Earth‘s orbit.
The discovery was made the night of Feb. 15 by Senior Research Specialist Kacper Wierzchos and Research Specialist Theodore Pruyne, both with the Catalina Sky Survey at the University of Arizona College of Science.
I have always been interested in galactic archaeology, but I don‘t think this is what they meant. Did you know that dinosaurs lived on the other side of the Galaxy?
(28.08.2019)
China‘s heaviest satellite positioned in geosynchronous orbit
China‘s heaviest and most advanced satellite, Shijian-20, reached its fixed position in geosynchronous orbit Sunday, marking the first successful flight of DFH-5 satellite platform, according to the China Aerospace Science and Technology Corporation.
I have always been interested in galactic archaeology, but I don‘t think this is what they meant. Did you know that dinosaurs lived on the other side of the Galaxy?
(28.08.2019)