Daniel Machacek

@danielmachacek.bsky.social

1606 Followers 195 Following

Space nerd, Image processor, Lazy photographer, Humanist

Photo of Indian actor Kabir Bedi from Sandokan
Black-and-white map of Titan in Mollweide projection combining practically all usable high resolution radar and near infrared data obtained by Radar instrument and ISS camera onboard Cassini spacecraft.
Contrast enhanced black and white image of asteroid Donaldjohanson from the MVIC camera onboard Lucy spacecraft. (Sharp transition in brightness in the right part of image is caused by different response of neighboring CCD sensors in camera and incompleteness of calibration process.)
Crescent Mars from Psyche spacecraft. Color image showing thin crescent with multiple white clouds and thin atmosphere.
Image of bright aurora glowing on the night side of Jupiter with stars visible behind horizon with possible footprint caused by Europa's movement through Jovian magnetic field in the right part of image. Image was taken by SRU camera onboard Juno spacecraft during orbit 76.
Color photo of Stramberk Castle on a full moon night. Image shows main tower of Stramberk Castle (Trúba) surrounded by trees with night sky and distant hills behind it. Photo Credit: Daniel Machacek
Color image of Mars with a double cyclone near the north polar ice cap at the top of image. Also visible in the center of the image is the Valles Marineris canyon, on the left is the Ascraeus Mons volcano, and at the very bottom is the frost-covered Argyre Planitia.
Two color images of the crescent of Mars with a cyclone near the north polar ice cap at the top of the image. The images were taken on August 7, 2025 at 12:30 and 14:20 UTC.
Comparison between shadow relief maps of Aphrodite Terra based on original topography from Magellan's altimeter (top image), denoised version (middle image) and "ground truth" based on stereo imaging analysis by Robert R. Herrick (bottom image). (Herrick, R. R., D. L. Stahlke, and V. L. Sharpton, Fine-scale Venusian topography from Magellan stereo data, EOS, Transaction, American Geophysical Union, 93, No. 12, 125-126, 2012)
Two images show the difference between the new (the left image) and old (the right image) versions of the map around the South Pole. The new version adds coverage by using Magellan's SAR MIDR mosaics from PDS archive volume MG_0127.
Comparison between new (the left image) and old topographic map of Venus (the right image).
Red and green Aurora Borealis above distant forest and snowy field through fisheye lens.
Surface of Titan from Huygens probe. Image shows terrain similar to dry riverbed covered by pebbles. Credit: ESA / NASA / JPL / University of Arizona / Daniel Macháček.
Color image of Martian moon Phobos with large crater Stickney near center of the image.
Reconstructed global view of skittle-shaped asteroid 52246 Donaldjohanson from Lucy spacecraft. Image has color but Donaldjohanson is essentially grey object and color images were taken only at very low resolution. Asteroid Donaldjohanson has two cratered lobes, one larger and one smaller, connected by a smoother neck.
Long exposure image composite of interstellat comet 3I/Atlas. The comet is visible like green spot with a faint tail in the center of the image with star trails around it. Total exposure around 50 minutes. The source images for the composite image were taken on November 19, 2025.
Black-and-white image of bright aurora glowing on the night side of Jupiter with stars visible behind horizon. Image taken by SRU camera onboard Juno spacecraft during orbit 69.
Comparison between reprojected maps of Pluto in Mollweide oblique projection. Original monochrome map published by the New Horizon team on top and new color map with extended coverage below.
Small preview of color photographic map of Pluto in Mollweide oblique projection. It contains one large global map with four small hemispheric maps and basic description. Full version of this map is available for download in links in the main post. Credit: NASA/JHU-APL/SwRI/Marc W. Buie/ESA/Daniel Machacek.
Nine Hawk jets of British aerobatic display team Red Arrows with colorful iridescent clouds.
Global color image of Mars from Hope Probe with north polar ice cap visible on the top of the image, Valles Marineris on the left and lots of clouds over Meridiani Planum on the right. Date: December 21, 2024. 14:46 UTC. Credit: Emirates Mars Mission (EMM)/EXI/D. Machacek.
Map of Pluto in approximately natural colors in Lambert azimuthal equal-area projection. It shows anti-Charon hemisphere with large bright area, Sputnik Planitia (heart of Pluto), in the center.
Color image of Pluto's moon Charon from MVIC camera onboard New Horizons spacecraft. Image is showing half of the Charon's disc at resolution 650 meters per pixel.
Color image of high altitude clouds over Martian canyon Valles Marineris. Valles Marineris is visible at the top right of the image under another layer of lower altitude clouds. Clouds at lower altitudes are also visible across different parts of the image with other prominent Martian features such as Noctis Labyrinthus and Syria Planum to the left and Sinai and Solis Planum in the right part of the image.
Color enhanced detail of cirrus' cloud filaments showing pastel colors of circumzenithal arc and cloud iridiscence (irisation).
Montage of twelve color images of Mars taken by EXI imager onboard Hope Probe Mars orbiter. Credit: Emirates Mars Mission (EMM)/EXI/D. Machacek.
3D anaglyph image of asteroid Donaldjohanson
Black-and-white image of bright aurora glowing on the night side of Jupiter from the Juno spacecraft.
Moon and Mars close together through colorful hole in the clouds.
Enhanced color mosaic of Snowman feature on the surface of Vesta. Snowman is made from three large craters close together.
Enhanced color mosaic of Snowman feature on the surface of Vesta. Snowman is made from three large craters close together.
False colorised thermal infrared mosaic of pentagon shaped six cyclones on the south pole of Jupiter
Color mosaic of the area on Mars from impact basin Argyre Planitia on the top to the Thaumasia and Claritas Fossae at the bottom.
Color mosaic of Martian impact basin Argyre Planitia with atmosphere on the horizon.
Mosaic of Titan's surface from DISR imager onboard Huygens probe at 32 meters per pixel.
Crop from global map of Venus showing Manatum Tessera feature in the west part of Aphrodite Terra.
Close encounter of Venus with Moon behind clouds with some stars above them and a wooded hill below.
Color animation of Halley's comet nucleus from HMC camera onboard Giotto spacecraft. Credit: ESA/MPAe/D. Machacek
Flyby animation of comet Wild 2 from Stardust spacecraft. Credit: NASA/JPL-Caltech/D. Machacek
Color composite of the asteroid Dinkinesh and its moon Selam.
Morph animation of right- and left-look radar data of a very deep crater on the southeastern edge of Atla Regio on Venus. Credit: NASA/JPL/D. Machacek.
Mercury's distant horizon from very low altitude. Monochrome mosaic from MESSENGER's MDIS camera images.
Collage of all cometary nuclei imaged by spacecrafts and planetary radars.
253 Mathilde, a C-Type asteroid from the NEAR spacecraft on June 27, 1997. Credit: NASA/JPL/JHU-APL/D. Machacek.
A color composite of crescent Uranus from Voyager 2 spacecraft
Color mosaic of Saturnian rings with spokes. Small moons Enceladus and Prometheus are visible close to the rings. Small part of Saturn is also visible.
Dwarf planet Pluto in approximately natural colors from New Horizons' MVIC camera