Archiv: interplanetary medium


02.04.2020 - 18:16 [ Xinhuanet ]

NASA selects new mission to study giant solar particle storms

The new mission, called the Sun Radio Interferometer Space Experiment (SunRISE), will help understand how the solar system works to protect astronauts traveling in space by providing better information on how the Sun’s radiation affects the space environment, said the release.

01.01.2020 - 23:13 [ NASA ]

NASA to Announce New Discoveries at Annual Astronomy Meeting

NASA researchers will present new findings on a wide range of astrophysics and other space science topics at the 235th Meeting of the American Astronomical Society, Saturday, Jan. 4, through Wednesday, Jan. 8, in Honolulu. NASA-related briefings will stream live on the agency’s website.

01.11.2019 - 06:33 [ Telegraph.co.uk ]

Sun’s protective ‚bubble‘ is shrinking

(18.10.2008)

The protective bubble around the sun that helps to shield the Earth from harmful interstellar radiation is shrinking and getting weaker, Nasa scientists have warned.

29.04.2019 - 10:51 [ Phys.org ]

Scientists predict sun’s activity will be weak during next solar cycle

(8. April 2019)

„We expect Solar Cycle 25 will be very similar to Cycle 24: another fairly weak cycle, preceded by a long, deep minimum,“ said panel co-chair Lisa Upton, Ph.D., solar physicist with Space Systems Research Corp. „The expectation that Cycle 25 will be comparable in size to Cycle 24 means that the steady decline in solar cycle amplitude, seen from cycles 21-24, has come to an end and that there is no indication that we are currently approaching a Maunder-type minimum in solar activity.“

14.04.2019 - 19:50 [ Washington Post ]

Scientists predict a new solar cycle is about to begin and that it might be stronger than the last one

(11. April 2019)

The decline in sunspot activity through cycle 24 was worrisome to some space weather scientists in that it suggested a return to a lengthy “solar drought,” reminiscent of the Maunder Minimum period of 1645-1715. Records show the sun was essentially spotless for this lengthy period, coinciding with the “Little Ice Age” in Europe and tickling the interest of scientists to wonder whether there is a cause-and-effect relationship between solar behavior and Earth’s climate.

14.04.2019 - 19:47 [ Phys.org ]

Scientists predict sun’s activity will be weak during next solar cycle

(8. April 2019)

„We expect Solar Cycle 25 will be very similar to Cycle 24: another fairly weak cycle, preceded by a long, deep minimum,“ said panel co-chair Lisa Upton, Ph.D., solar physicist with Space Systems Research Corp. „The expectation that Cycle 25 will be comparable in size to Cycle 24 means that the steady decline in solar cycle amplitude, seen from cycles 21-24, has come to an end and that there is no indication that we are currently approaching a Maunder-type minimum in solar activity.“

14.04.2019 - 19:46 [ National Aeronautics and Space Administration ]

Solar Wind Loses Power, Hits 50-year Low

(23. September 2008)

In a briefing today at NASA headquarters, solar physicists announced that the solar wind is losing power.

„The average pressure of the solar wind has dropped more than 20% since the mid-1990s,“ says Dave McComas of the Southwest Research Institute in San Antonio, Texas. „This is the weakest it’s been since we began monitoring solar wind almost 50 years ago.“

14.04.2019 - 18:54 [ Telegraph.co.uk ]

Sun’s protective ‚bubble‘ is shrinking

(18.10.2008)

The protective bubble around the sun that helps to shield the Earth from harmful interstellar radiation is shrinking and getting weaker, Nasa scientists have warned.

08.12.2018 - 15:32 [ Huffington Post ]

Waiting For The Next Sunspot Cycle: 2019-2030

(6.12.2017) By Cycle 25 or 26, magnetic fields may be too weak to punch through the solar surface and form recognizable sunspots at all,

08.12.2018 - 15:25 [ Resonance.is ]

Is our solar system heating up?

With the decrease of solar activity, the magnetic field of oursun is losing power too. This heliosphere shields us forming a gigantic bubble which surrounds and protects our solar system from harmful galactic cosmic rays, these high-energy particles that zip through the universe. Thanks to Voyagers 1 leaving the Solar system, we now have a good vision of it and of its shielding effect. It appears to be an indispensable protection for our fast moving throughout the Universe. But, with a weaker heliosphere Earth will begin to endure more and more the cosmic rays.

08.12.2018 - 15:19 [ ScienceMag.com ]

Decades-Long Changes of the Interstellar Wind Through Our Solar System

(6.9.2013) The flow of interstellar gas and dust through the solar system was thought to be unvarying, but Frisch et al. (p. 1080) show that there has been a significant variation of the direction of the flow of interstellar helium through the solar system over the past 40 years.

08.12.2018 - 15:14 [ Telegraph.co.uk ]

Sun’s protective ‚bubble‘ is shrinking

(18.10.2008) The protective bubble around the sun that helps to shield the Earth from harmful interstellar radiation is shrinking and getting weaker, Nasa scientists have warned.

08.12.2018 - 15:12 [ Leibniz-Institut für Atmosphärenphysik e.V. an der Universität Rostock ]

Influence of the 11-year solar cycle on planetary wave structures in the stratosphere and mesosphere

(2011) The stationary wave structures in the spatial distribution of stratospheric ozone have a significant influence on the local radiative heating and therefore on planetary wave propagation, temperature, circulation and trace gas distributions in the stratosphere and mesosphere. We show that these effects of O3* , which is the zonally asymmetric component of ozone, are modified by the 11-year cycle in solar irradiation,

08.12.2018 - 14:54 [ Washington Post ]

Sun activity is in free fall, but you shouldn’t expect a new little ice age

(11.11.2013) “Solar activity is declining very fast at the moment,” Mike Lockwood, a professor of space environmental physics at Britain’s Reading University, said, “we estimate faster than at any time in the last 9,300 years.”

08.12.2018 - 14:50 [ BBC ]

Has the Sun gone to sleep?

(17.Januar 2014) Scientists are saying that the Sun is in a phase of „solar lull“ – meaning that it has fallen asleep – and it is baffling them.

08.12.2018 - 14:44 [ notrickszone.com ]

Solar Cycle Continues To Be The Weakest In 2 Centuries

(23.8.2017) Our source of energy and life at the center of our solar system was significantly below normal with respect to activity last month.

The measured sunspot number (SSN) was 18.3. That was only 36% of what is typical (51) this far into the solar cycle – calculated from the previous 23 solar cycles recorded.

08.12.2018 - 14:31 [ Space.com ]

No Global Cooling Miracle: Sun’s Activity Lull Will Stop Soon, Study Suggests

We can’t count on waning solar activity to help bail us out of our climate-change problem in the near future, a new study suggests.

08.12.2018 - 14:24 [ Firstpost.com ]

Mini ice-age, planet cooling from natural dip in Sun’s heat ruled out: Study

A team of scientists from the Center of Excellence in Space Sciences and Department of Physical Sciences at Indian Institute of Science Education and Research (IISER) Kolkata led by Prantika Bhowmik and Professor Dibyendu Nandi have dismissed the speculation ofessor Dibyendu Nandi have dismissed the speculation and claim ……………………..

20.11.2018 - 15:45 [ NASA Goddard / Youtube ]

NASA | Thermonuclear Art – The Sun In Ultra-HD (4K)

Presented in ultra-high definition, the video presents the dance of the ultra-hot material on our life-giving star in extraordinary detail, offering an intimate view of the grand forces of the solar system.

20.11.2018 - 15:35 [ NASASolarSystem / Youtube ]

Voyager Satellites Find Magnetic Bubbles at Edge of Solar System

(9.11.2011) This ribbon shows the emission of energetic particles and seems to indicate some interaction with interstellar space.

20.11.2018 - 15:33 [ NASA Goddard / Youtube ]

Understanding the Magnetic Sun

(29.1.2016) Grasping what drives that magnetic system is crucial for understanding the nature of space throughout the solar system: The sun’s invisible magnetic field is responsible for everything from the solar explosions that cause space weather on Earth – such as auroras – to the interplanetary magnetic field and radiation through which our spacecraft journeying around the solar system must travel.

20.11.2018 - 15:05 [ Forbes.com ]

Is Earth’s Magnetic Shield Eroding?

(29.3.2018) The strength of Earth’s main magnetic field is currently about 29.5 microteslas, down 5 microteslas, or 14 percent from its strength three centuries ago.

We know this. There is no question of this.

20.11.2018 - 14:47 [ Institute of Electrical and Electronics Engineers ]

The Case of Earth’s Incredible Shrinking Field

(1.11.2006) Earth’s magnetic field has been monitored carefully since the 1830s, when the German polymath Karl Friedrich Gauss invented a way to measure its intensity. Since then, the field has decayed at the ­startling rate of about 5 percent per century

20.11.2018 - 13:16 [ CBNcom ]

Something’s Happening to the Sun Right Now, Here’s What It Means for Earth

(13.11.2018) If the trend continues, the NASA scientist says we could see record cold in a matter of months.

„The thermosphere always cools off during Solar Minimum. It’s one of the most important ways the solar cycle affects our planet,“ Mlynczak said.

20.11.2018 - 13:15 [ National Aeronautics and Space Administration ]

Solar Wind Loses Power, Hits 50-year Low

Sept. 23, 2008: In a briefing today at NASA headquarters, solar physicists announced that the solar wind is losing power.

„The average pressure of the solar wind has dropped more than 20% since the mid-1990s,“ says Dave McComas of the Southwest Research Institute in San Antonio, Texas. „This is the weakest it’s been since we began monitoring solar wind almost 50 years ago.“

20.11.2018 - 13:13 [ Telegraph.co.uk ]

Sun’s protective ‚bubble‘ is shrinking

(18.10.2008) The protective bubble around the sun that helps to shield the Earth from harmful interstellar radiation is shrinking and getting weaker, Nasa scientists have warned.

20.11.2018 - 13:08 [ National Aeronautics and Space Administration ]

Excitement Increases as Voyager 2 sees a decrease in Heliospheric Particles

(14.11.2018) In the following graph of the Low Energy Telescope data, right around the beginning of November, you’ll notice a pretty dramatic change: All of a sudden, the Voyager 2 counting rate of low-energy particles dropped, although it hasn’t yet dropped to nearly zero as it did when Voyager 1 entered interstellar space. Scientists will keep their eye on these graphs …

20.11.2018 - 13:05 [ NASA Sun & Space ‏/ Twitter ]

Excitement goes up ? as @NASAVoyager 2’s count of heliospheric particles goes down These low-energy particles originate within the Sun’s bubble of magnetic influence — the heliosphere — and their count should drop to near-zero in interstellar space:

(17.11.2018)

20.11.2018 - 12:40 [ Scienceblogs.com ]

Why the Earth wears an Antimatter Belt!

(9.8.2011) The Earth’s magnetic field — the same field that causes your compass needle to point North — extends far out into space, and shields us from the high-energy, charged particles that come from not only the Sun, but also from powerful galactic and extra-galactic sources!

The Solar Wind, however, would by far be the most deadly to us, were it not for this magnetic „shield“ that the Earth produces.

20.11.2018 - 12:23 [ qrz.com ]

A new solar index number is being published – Thermosphere Climate Index

(1.10.2018) Hi Everybody;

As the sun plummets into the solar minimum a new index is derived to measure the total energy budget of the planet.

20.11.2018 - 12:20 [ spaceweatherarchive.com ]

The Chill of Solar Minimum

(27.9.2018) As 2018 comes to an end, the Thermosphere Climate Index is on the verge of setting a Space Age record for Cold. “We’re not there quite yet,” says Mlynczak, “but it could happen in a matter of months.”

20.11.2018 - 12:18 [ Phys.org ]

Solar activity is declining—what to expect?

(17.8.2015) The solar cycle is the periodic change in the Sun’s activity and appearance like changes in the number of sunspots. It has an average duration of about 11 years. The current solar cycle began on in January 2008, with minimal activity until early 2010. The sun is now on track to have the lowest recorded sunspot activity since accurate records began in 1750.