The core of the Milky Way rises in this mid-winter morning twilight in Death Valley National park.
The evening twilight fades into a starry night over Mount Damavand, a spectacular volcanoes in Iran.
The evening twilight ends over snow-covered Alborz Mountains from a village in the Haraz valley.
Bright stars of constellation Orion appear in the sky during this 2-hour exposure that has captured star trails on a single film frame.
Mount Damavand in the Alborz Mountains of Iran poses in twilight.
The Milky Way in the constellations Scorpius and Sagittarius is photographed in the morning twilight from a pond in desert near Kashan, central Iran.
The full moon enters the shadow of the Earth while the evening twilight proceeds over the Zagros Mountains of Iran.
This surreal, wintry scene shows the eclipsed Moon rising behind the Zagros Mountains of Iran in the evening twilight.
As the evening twilight fades in to darkness, clouds begin to scatter away above a skygazer who prepares his gears for a night of enjoyment and adventures.
A TWAN photographer enjoys him time as the evening twilight fades to darkness above Mount Damavand.
With the morning twilight painted the sky in blue, a meteor streaks through the constellation Gemini during the peak hours of Geminid meteor shower.
Morning twilight fades away the stars above historic ruins near Damghan of Iran. Venus is the brightest in the sky and Mercury is lower at the horizon.
The evening twilight fades in to darkness as the Moon and bright planet Venus shine above the southwestern horizon.
As the morning twilight paints the night sky in blue, this one-hour exposure by a film camera has captured the trails of the rising Moon and stars.
The shadow of the Earth appears after sunset in the opposite horizon, as seen from atop the 3600m summit of Mount Gargash in Zagros Mountains of Iran.
Above colorful trees of autumn, stars are fading away in the morning twilight. Prominent constellation of Orion as it at the upper right.
As the morning twilight approaches the elongated zodiacal light appears extensively above Alamut fortress in Iran.
The crescent Moon meets with bright planet Venus in the evening twilight over old ruins near Natanz in central Iran.
As the evening twilight fades in to darkness, clouds begin to scatter away above an amateur astronomer who prepares his gears for a night of enjoyments.
As the night begins in an observing location away from city lights, a group of amateur astronomers and night sky photographers prepares their gears.
As the evening twilight ends over snow-covered Alborz Mountains, bright winter stars appear in the starry sky.
The sky gets suddenly clear in this January evening, after a snowstorm in Alborz Mountains some kilometers north of Tehran.
The crescent moon shines in the evening sky of Bhaktapur, a World Heritage site of temples and monuments in Kathmandu Valley of Nepal.
Moon and Venus meet in twlight, as seen from a historic shrine in north east Iran.
In the deep blue evening twilight the Moon shines above the mausoleum of Ommar Khayyam in the historic city of Nishapur, northeastern Iran.
The first lights of morning shine on Mount Damavand in this long exposure startrail image from the Alborz Mountains.
Orion rising over the 3200-year old Ziggurat of Choqha Zanbil in southwest Iran.
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