Astronomical observatory Rijeka West - Ivica Zajac

Astronomical observatory Rijeka West - Ivica Zajac Amateur Astronomer
High ResoIution Astrophotography

Tonight's capture of Venus and JupiterJune 8th, 2026The Venus-Jupiter conjunction is putting on an incredible show in th...
08/06/2026

Tonight's capture of Venus and Jupiter
June 8th, 2026
The Venus-Jupiter conjunction is putting on an incredible show in the night sky. On June 8 and 9, the two brightest planets in the solar system appear extremely close together—separated by just 1.5 to 1.6 degrees.

Close encounter of Jupiter and Venus tonight2 days to the conjunction.
06/06/2026

Close encounter of Jupiter and Venus tonight

2 days to the conjunction.

The conjunction of the Moon and planet Venus a few minutes agoMay 18, 2026
18/05/2026

The conjunction of the Moon and planet Venus a few minutes ago
May 18, 2026

The astounding area of Plato, the lunar Alpes and Vallis Alpes on the Moon. Vallis Alpes is a lunar valley feature that ...
08/05/2026

The astounding area of Plato, the lunar Alpes and Vallis Alpes on the Moon. Vallis Alpes is a lunar valley feature that bisects the Montes Alpes range. It extends 166 km from the Mare Imbrium basin, trending east-northeast to the edge of the Mare Frigoris.

Newton 8" - Televue Barlow 3x - ZWO ASI 224 MC

Earthset captured through the Orion spacecraft window at 6:41 p.m. EDT, April 6, 2026, during the Artemis II crew’s flyb...
17/04/2026

Earthset captured through the Orion spacecraft window at 6:41 p.m. EDT, April 6, 2026, during the Artemis II crew’s flyby of the Moon.
A muted blue Earth with bright white clouds sets behind the cratered lunar surface. On Earth’s day side, swirling clouds are visible over the Australia and Oceania region. In the foreground, Ohm crater has terraced edges and a flat floor interrupted by central peaks—formed when the surface rebounded upward during the impact that created the crater.

Mare Orientale and its surrounding from Artemis 2 taken by the crew of the Orion capsuleSome 3,85 billion years ago an i...
10/04/2026

Mare Orientale and its surrounding from Artemis 2 taken by the crew of the Orion capsule

Some 3,85 billion years ago an impact of an asteroid with a diameter of 50-100 km formed that immense crater.
Compared with most other lunar basins, Mare Orientale is less flooded by mare basalts, so that much of the basin structure is visible. The basalt in the central portion of the Orientale basin is probably less than 1 km in thickness which is much less than mare basins on the Earth-facing side of the Moon. The collision caused ripples in the lunar crust, resulting in the three concentric circular features. The innermost rings of this vast, multi-ringed crater are the inner and outer Montes Rook, and the outermost ring are the Montes Cordillera, 930 km in diameter. Outward from here, ejecta extend some 500 km from the foot of the mountains and form a rough surface with hummocks and with features radially aligned towards the center.

Artemis 2 moon shots from April 4 and 6Three moon shots on consecutive days from the Artemis 2 Orion capsule. Some of t...
06/04/2026

Artemis 2 moon shots from April 4 and 6

Three moon shots on consecutive days from the Artemis 2 Orion capsule. Some of the moon's far side is visible, as well, on the lower left edge, just beyond the black patch that is Orientale basin, a nearly 1000-km-wide crater that straddles the Moon’s near and far sides and is partly visible from Earth. The dark areas in the center and right side of the disk are known lunar marea, which are unique to the near side of the Moon.
To the right of Mare Orientale are 2 smaller dark patches Grimaldi and Riccioli that are visible from Earth close to the western edge.

Binary star 61 Cygni61 Cygni is a widely-separated binary star system, composed of two K class (orange) main sequence st...
04/04/2026

Binary star 61 Cygni

61 Cygni is a widely-separated binary star system, composed of two K class (orange) main sequence stars, the brighter 61 Cygni A and fainter 61 Cygni B, which have apparent magnitudes of 5.2 and 6.0, respectively. Both appear to be old-disk stars, with an estimated age that is older than the Sun. At a distance of just over 11 light-years, it is the 15th-nearest-known star system to the Earth.
61 Cygni A is the fourth-nearest star that is visible to the naked eye for mid-latitude northern observers, after Sirius, Epsilon Eridani, and Procyon A.
Angular separation: 30"

The Full Moon and the western lunar limbTS APO triplet refractor 80/480 - Barlow 3x - ZWO ASI 224 MC
04/03/2026

The Full Moon and the western lunar limb

TS APO triplet refractor 80/480 - Barlow 3x - ZWO ASI 224 MC

A nice view of the lunar southwest during the waning crescent phase
18/01/2026

A nice view of the lunar southwest during the waning crescent phase

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