(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.
Archiv: photosphere
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.“
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.
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.“
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.“
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.
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,
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.
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.
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.
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,
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.”
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.
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.
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.
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 ……………………..
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.
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.
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.
Ultraviolet Flux Decrease Under a Grand Minimum from IUE Short-wavelength Observation of Solar Analogs
(27.12.2017) From this linear regression we estimate a range in UV flux of 9.3% over solar cycle 22 and a reduction of 6.9% below solar cycle minimum under a grand minimum.
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,
The sun is spotless and serene: What does it mean?
(30.7.2018) They believe that Cycle 25 will be smaller than the current cycle by approximately 25 percent.
Sun‘s Current Solar Activity Cycle Is Weakest in a Century
(11.12.2013) Scientists also think they know why relatively few super-fast solar energetic particles, or SEPS, have been measured in Earth‘s neighborhood during the current cycle, which began in early 2008. It has to do with a weakened interplanetary magnetic field, another characteristic of Solar Cycle 24, they say.
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.