A quick session of the sun

 

Mushroom and Vega

Another clear night with a bright moon. This time, I found a beautiful *Boletus edulis* (porcini mushroom). Below it stands a solitary trumpet lichen fluorescing a vivid blue, while the porcini glows with a greenish hue. *Boletus edulis* is an edible mushroom found in both deciduous and coniferous forests. Technically, it is a bolete. It forms mycorrhizal associations and is therefore dependent on host trees.

In the sky, the bright star Vega is visible in the constellation Lyra.
It lies approximately 25 light-years from Earth, emits a bluish light, and rotates so rapidly that it is flattened into an egg-like or ellipsoidal shape.
Its mass is roughly 2.1 to 2.5 times that of the Sun.
It shines with a luminosity about 40–50 times greater than that of the Sun.
Surrounding the star is a disk of dust and asteroid belts that may indicate the presence of a planetary system.

Fungi & Night Sky

A clear evening in the woods behind my house. Simply walking around looking for beautiful little objects is a pleasure. It is now mushroom season, and many of them fluoresce under UV light. These fungi are vital, acting as nature’s cleanup crew by breaking down dead wood and leaves, thereby returning nutrients to the soil.
What we pick and call a "mushroom" is merely the fruiting body. Beneath the ground lies a vast, intricate network of fungal threads known as mycelium. It is through this mycelium that the fungus absorbs water and nutrients from the soil.
Symbiosis with trees (Mycorrhiza): Many of our most common edible mushrooms live in symbiosis with forest trees. Through underground contact, they exchange services: the fungus provides the tree with water and minerals, while the tree supplies the fungus with sugars (carbohydrates) produced via photosynthesis.
The soil's kidneys: Fungi are extremely efficient at absorbing substances from the soil. Unfortunately, this means they can also take up and store environmental toxins, heavy metals, and radioactive substances (such as cesium) if they grow in contaminated soil.
Visible in the starry sky are the constellations Perseus, Cassiopeia, and Auriga.

 

The chromosphere of the sun - high res photo.

The chromosphere is the thin middle layer of the Sun's atmosphere, located just above the visible surface (photosphere) and below the outer atmosphere (corona). It comes from the Greek word chroma, meaning color, because it shines with a bright red glow during total solar eclipses. The red color comes from glowing hydrogen gas, specifically the hydrogen-alpha (H-alpha) light wavelength. It extends roughly 2,000 to 4,000 kilometers (about 1,200 to 2,500 miles) above the solar surface. Unlike inner layers, it gets hotter as you move outward, rising from about 4,000 K near the bottom to 10,000 K (or higher) at the top. Possible to see/photograph: Spicules: Narrow, grass-like jets of plasma that shoot upwards from the bottom layer before falling back down.

Prominences and filaments: Huge, cool loops and clouds of gas held above the surface by magnetic fields. Visibility: It is normally hidden by the blinding brightness of the photosphere below, but it is visible during total solar eclipses or through special solar filters.

Photo taken with several photos stitched together as a high res photo of the sun.

Blue Trumpet Lichens and starry sky

 

Solar from Carpe Noctem Observatory

 

POTENTIALLY DANGEROUS SUNSPOT

A bonus day of partly cloudy weather over the Carpe Noctem observatory. I got to watch and photograph the sun through thin clouds but it was still nice. A little curious about the active area around sunspot group 4513 which according to spaceweather.com is a POTENTIALLY DANGEROUS SUNSPOT: Sunspot 4513 has developed a 'beta-gamma-delta' magnetic field that harbors energy for X-class solar flares. Unlike Thursday's M8-class flare, which missed Earth, future flares will not miss. We're in the strike zone now, according to spaceweather.com.

Some of the images show this area, you can see as a white tear in the sunspot. 

Perseid meteor shower 2026 from Sweden

Photographing Perseid meteors. The radiant of the meteor shower appears to come from the constellation Perseus in the sky. And it stands high in the sky from midnight when the peak of the shower is supposed to occur. My colleague and I went out to the east coast with as little light pollution as possible and this year without any moon to interfere so the conditions were nice. It was not astronomically dark but good enough to see even faint meteors and the Milky Way was clearly visible to the south. I chose to photograph mostly to the east and south and got a couple of nice pictures with the Milky Way. I set the camera to rolling exposures, but then you have to hope that some bright meteor comes along. I also photographed with a macro/wide angle lens and got most of the meteors. In some cases I used UV light so that some objects fluoresced in different beautiful colors. Very dry on the rock outcrops and previous water puddles had dried out of masses and algae etc. dried on the edge which fluoresced masses in UV, mostly in blue.

There were several nice pictures, one that was published as NASA's picture of the day, and a nice night on the coast.

 

Nice prominences

Nice prominences the other day.

 

Meteor shower

The Perseid meteor shower peaked on the night of August 12-13. So after the partial solar eclipse, a colleague and I went to the east coast to photograph this. The meteor shower is created when the Earth passes through a trail of space debris and particles left behind by comet 109P/Swift-Tuttle. When these particles (often no larger than a grain of sand) fall into the Earth's atmosphere, they travel at about 59 kilometers per second and burn up, creating the luminous streaks in the sky.

The picture shows 5 meteors over the Baltic Sea. In the foreground is a close-up (macro) of detailed lichen in UV light (blue and orange) and also a diving beetle (visible in yellow in UV)! Most species are dark, oval and flat to reduce water resistance. Their hind legs act as powerful, hair-covered oars that they use to move through the water. Because they breathe air, they carry an oxygen bubble under their coverts when they dive. This bubble acts as a kind of "physical gill" and is replenished when the ram backs up to the surface, tail first.

Prominence

 

It was partly cloudy and I took the opportunity to look through the solar telescope between the clouds and saw a nice prominence on the edge of the sun. I managed to take a photo before it got cloudy. The prominence is bigger than our planet Earth, a beautiful sight!

The Sun

 

Sunny days and the sun shows several sunspots and prominences. The images were taken with Ha and CaK filters, different wavelengths.

 

A CaK filter (Calcium K-line filter) is a specialized solar filter for telescopes that isolates light at a specific wavelength of 393.3 nm in the deep violet/near ultraviolet (UV) spectrum. The filter is used in astronomy to observe and photograph the sun, as it makes the lower chromosphere and the border region with the photosphere visible.

 

H-alpha solar filterH-alpha solar filterA H-alpha (Hydrogen-alpha) solar filter is a specialized and advanced optical system that isolates an extremely narrow light wavelength of 656.28 nanometers (nm), which makes it possible to safely observe the sun's chromosphere. Unlike regular white light solar filters, an H-alpha solar filter shows dramatic details such as prominences (gas clouds ejected from the edge), filaments, sunspots and solar flares.

Bright NLC´s

 

Noctilucent clouds are the highest clouds in Earth's atmosphere, forming in the mesosphere about 76 to 85 kilometers (50 miles) above the surface.

Meaning "night-shining" in Latin, they appear as electric-blue, silvery, or glowing wisps during summer deep twilight when they are illuminated by the sun from below the horizon.

Noctilucent clouds (NLCs), also called polar mesospheric clouds (PMCs) when viewed from space, are a tenuous atmospheric phenomenon. Unlike typical weather clouds that form less than 12 miles above Earth, NLCs occur at the very edge of space.How

For noctilucent clouds to form, three precise ingredients are required:

Extremely Low Temperatures: Temperatures in the mesosphere must drop below -120°C to -140°C.Water

Trace amounts of water vapor must be present.

Tiny dust particles are needed, primarily from micrometeors burning up in the atmosphere.

Water vapor freezes onto the meteoric dust to form microscopic ice crystals, which reflect sunlight. Their striking blue color is a result of the ice crystals scattering sunlight in the upper atmosphere.

Noctilucent clouds are a seasonal and latitudinal phenomenon. They occur only during the summer months when the upper atmosphere above the polar regions experiences its coldest temperatures.

Northern Hemisphere: Best viewed between mid-May and mid-August, primarily at mid-to-high latitudes (roughly 45° to 80° North, including northern Europe, Canada, and the northern United States).

Southern Hemisphere: Best viewed between mid-November and mid-February

Photos taken in Vallentuna Sweden 16-17/7 2026.

Eruptions

 

2 eruptions on the sun's eastern edge today from groups 4478 & 4479. Otherwise a fairly calm sun on the disk but a new sunspot is in the works on the western edge as well as a beautiful prominence.

Great sunspots

Several sunspot groups with active areas. Many eruptions have occurred from these areas in the days, some strong, and have now created auroras as far south as +36 New Mexico. Here in Sweden it is far too bright right now for us to be able to see any auroras. Today's images were taken with CaK filter 394 nm which is in the border area between the photosphere, which is visible in white light, and the sun's chromosphere, which is reserved for narrow-band H-alpha filters. In addition to the structures known from white light, such as sunspots, the network of chromospheric flares distributed over the entire solar surface also becomes visible, which precedes the formation of sunspots, as well as supergranulation cells and Ellerman bombs.

Noctlicent clouds and owls

A clear summer night with fog over open areas. Noctilucent Clouds are visible in the sky. All around me I heard screams in the trees and saw several owls, Strix aluco owls, chicks screaming for food. I managed to catch one of them flying between the trees.

Noctilucent Clouds are thin clouds of ice crystals that form at an altitude of 85 kilometers in the mesosphere. They are the highest clouds on Earth and are visible during the summer months when they are illuminated from below by the sun which is then below the horizon