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Pierre Markuse
29,387 followers -
Never stop being curious...
Never stop being curious...

29,387 followers
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Curiosity's Wheels Slowly Degrading

In this image, taken March 19th, 2017, by the Mars Hand Lens Imager (MAHLI) aboard the Curiosity Rover on Mars you can see two of its left wheels, with damage clearly visible. On the top of the middle wheel (right one in the image) you can see one of the raised treads, called grousers, partially detached from the wheel.

The damages are caused by wear and tear, mostly from sharp rocks on the surface of Mars. Given the expected longevity of the wheels, the damage should not affect the rover's ability to reach all planned mission destinations.

More information here:
http://photojournal.jpl.nasa.gov/catalog/PIA21486

Curiosity's six aluminum wheels are about 20 inches (50 centimeters) in diameter and 16 inches (40 centimeters) wide. Read more on the size of Curiosity compared to other Mars rovers here:
https://plus.google.com/u/0/+PierreMarkuse/posts/A5dybCaxn45

Take a look here for a collection of Curiosity selfies:
https://plus.google.com/+PierreMarkuse/posts/d3ptcjTuHxH

More on the Curiosity rover:
http://www.nasa.gov/mission_pages/msl/index.html
https://en.wikipedia.org/wiki/Curiosity_%28rover%29

Image credit: PIA21486: Break in Raised Tread on Curiosity Wheel https://goo.gl/zzFvVx NASA/JPL-Caltech/MSSS / Edited by +Pierre Markuse

Thank you for your interest in this Space/Space technology collection. Maybe add me on Google+ (+Pierre Markuse) and Twitter (https://twitter.com/Pierre_Markuse) or have a look at the Astronomy/Astrophysics collection here: https://goo.gl/x0zPAJ

#science #space #mars #curiosity #msl #curiosityrover #mahli #spaceexploration #spacetechnology #solarsystem
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Nebulae... - Foggy Things in Space

If you follow this collection you will have seen countless images of nebulae in space. Some faint, some bright, some small, some extremely large. It might be obvious to you that all those nebulae are somewhat alike, but of course not all are the same.

If you are interested to learn a few things about the different types of nebulae and see a few impressive images take a look at this article I wrote for PhotographingSpace.

Read the article here:
https://photographingspace.com/what-are-nebulae/

You might also like to read my former article on PhotographingSpace, giving a few backgrounds on why objects in space sometimes have different colors in different images. Read it here:
https://photographingspace.com/ap-color/

Image credit: 99 Planetary Nebulae (and a Protoplanetary Disk). Imaged by the Hubble Space Telescope Processed by Judy Schmidt https://goo.gl/UkOqcv CC BY 2.0 https://goo.gl/sZ7V7x

#science #astronomy #nebula #nebulae #nebulas #space #astrophotography #photography #photographingpspace

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Interacting Galaxies NGC 3447A and NGC 3447B

In this image, taken by the Hubble Space Telescope, you can see NGC 3447A and NGC 3447B. A pair of interacting galaxies located in the constellation of Leo (The Lion, https://goo.gl/GQSoe5), about 60 million light-years away from Earth.

NGC 3447B can be seen in the right part of the image, NGC 3447A is the smaller galaxy in the top left of the image.

The two galaxies are gravitationally distorting (https://goo.gl/ipKZIe) each other, and because of that it is hard to classify which type of galaxy they are. Both galaxies show what could be interpreted as disrupted spiral arms, but some categorize NGC 3447B as an irregular galaxy (https://goo.gl/Ixntg1).

NGC 3447 was discovered on March 18th, 1836, by the English astronomer John Herschel (https://goo.gl/WCo123).

More information here:
https://www.spacetelescope.org/images/potw1712a/

More on the morphological classification of galaxies:
https://en.wikipedia.org/wiki/Galaxy_morphological_classification

Image credit: NGC 3447 ESA/Hubble & NASA https://goo.gl/MblmaO CC BY 4.0 https://goo.gl/hNRHCd

Thank you for your interest in this Astronomy/Astrophysics collection. Maybe add me on Google+ (+Pierre Markuse) and Twitter (https://twitter.com/Pierre_Markuse) or have a look at the Space/Space Technology collection here: https://goo.gl/5KP0wx

#science #astronomy #galaxies #ngc3447 #ngc3447a #ngc3447b #interactingalaxies #hubble #hst #space
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Earth from Space: Mount Etna Lava Flow, March 16th, 2017

In this composite image you can see the a lava flow on the Mount Etna Volcano, Sicily, Italy, imaged by the Multi-Spectral Instrument (MSI) aboard the Sentinel-2A satellite. The images were taken March 16th, 2017.

The image is showing an infrared view of the recent lava flow on Mount Etna (https://goo.gl/Xv9cGa), an active stratovolcano on the east coast of Sicily, Italy. Make sure to watch the video with the alternating view linked below.

A video showing an alternate natural color/infrared view is available here on YouTube and Flickr:
https://youtu.be/o5S6SCZQzUY
https://flic.kr/p/SsauqJ

You can see and download a full-size version (10 meters/pixel) of this image and other images of the Mount Etna Volcano here:
https://flic.kr/s/aHskTG22RE

The area on Google maps:
https://goo.gl/3pSZtE

Technical Data

For those interested, here the technical data for this image. The image is a MSI Band 12-11-8 (NIR/SWIR) image. Warmer areas are showing up in red-yellow, contrast is slightly enhanced. Image scale is 10 meters/pixel.

More Images of Earth from Space:

You can find more images of Earth from Space in my latest collection post here (https://goo.gl/1wusNm). Even more images can be found on my Flickr here (https://www.flickr.com/photos/pierre_markuse/).

More on the Copernicus programme aimed at observing the Earth:
http://www.esa.int/Our_Activities/Observing_the_Earth/Copernicus
https://en.wikipedia.org/wiki/Copernicus_Programme

More on the Sentinel-2A satellite:
https://earth.esa.int/web/guest/missions/esa-future-missions/sentinel-2
https://en.wikipedia.org/wiki/Sentinel-2

Image credit: Mount Etna Volcano, Italy Contains modified Copernicus Sentinel data [2017], processed by +Pierre Markuse

Thank you for your interest in this Space/Space technology collection. Maybe add me on Google+ (+Pierre Markuse) and Twitter (https://twitter.com/Pierre_Markuse) or have a look at the Astronomy/Astrophysics collection here: https://goo.gl/x0zPAJ

#science #earth #volcano #italy #sicily #etna #mountetna #lavaflow #infrared #space #sentinel #sentinel2 #esa #satelliteimages #spacetechnology #photography
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Happy St. Patrick's Day 2017!

In this image, taken today, March 17th, 2017, St. Patrick's Day, by the Moderate Resolution Imaging Spectroradiometer (MODIS) aboard the Terra satellite you can see Ireland, totally not looking green from above, still Happy St. Patrick's Day 2017!

Interested in satellite images? More here on Flickr:
https://www.flickr.com/photos/pierre_markuse/

Terra (EOS AM-1) satellite

The Terra satellite is part of the Earth Observing System (EOS, https://goo.gl/XYed36), its Moderate Resolution Imaging Spectroradiometer (MODIS) can take measurements in 36 spectral bands ranging in wavelength from 0.4 µm to 14.4 µm, another MODIS instrument is orbiting Earth aboard the Aqua satellite.

More on the Terra satellite and the Moderate Resolution Imaging Spectroradiometer (MODIS) here:
http://terra.nasa.gov/
https://en.wikipedia.org/wiki/Terra_(satellite)
http://modis.gsfc.nasa.gov/about/design.php

Image credit: Ireland on St. Patrick's Day 2017 Terra MODIS images, accessed through NASA Worldview (https://worldview.earthdata.nasa.gov/) / Processed by +Pierre Markuse

Thank you for your interest in this Space/Space technology collection. Maybe add me on Google+ (+Pierre Markuse) and Twitter (https://twitter.com/Pierre_Markuse) or have a look at the Astronomy/Astrophysics collection here: https://goo.gl/x0zPAJ

#science #terra #modis #earth #ireland #stpatricksday #stpatricksday2017 #stpaddysday #saintpatricksday #clouds #space #satelliteimages #spacetechnology
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Uzboi Vallis on Mars

In this image taken by the High Resolution Imaging Science Experiment (HiRISE) aboard the Mars Reconnaissance Orbiter (MRO) you can see layered deposits in Uzboi Vallis (https://goo.gl/TkAnfE) on Mars. The composition of the clays (https://goo.gl/rMp4VH) in those deposits differs from clays found elsewhere on the valley floor, they may have been washed into the lake from surrounding clay-bearing surfaces.

More information on the image here:
http://www.uahirise.org/PSP_010329_1525

A wider near-natural color view can be found here:
https://goo.gl/nlezPg

More on the geology of Mars:
https://en.wikipedia.org/wiki/Geology_of_Mars

More on the Mars Reconnaissance Orbiter and the High Resolution Imaging Science Experiment (HiRISE):
http://www.nasa.gov/mission_pages/MRO/main/index.html
http://www.nasa.gov/mission_pages/MRO/spacecraft/sc-instru-hirise.html
https://en.wikipedia.org/wiki/HiRISE

Image credit: PSP_010329_1525 NASA/JPL-Caltech/Univ. of Arizona https://goo.gl/AcXNfh

Thank you for your interest in this Space/Space technology collection. Maybe add me on Google+ (+Pierre Markuse) and Twitter (https://twitter.com/Pierre_Markuse) or have a look at the Astronomy/Astrophysics collection here: https://goo.gl/x0zPAJ

#science #mars #mro #hirise #MarsReconnaissanceOrbiter #nasa #space #spaceexploration #solarsystem #clays #uzboivallis
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Earth from Space: Erta Ale Volcano, Ethiopia

In this composite image you can see the Erta Ale Volcano, Ethiopia, imaged by the Multi-Spectral Instrument (MSI) aboard the Sentinel-2A satellite. The images were taken March 10th, 2017.

Here we have an infrared image of the 613 meter high Erta Ale (smoking mountain) Volcano (https://goo.gl/aH31L0), an active basaltic shield volcano (https://goo.gl/UnoKAm), in Ethiopia. This infrared images allows you to see areas with higher temperatures. Erta Ale is the most active volcano in Ethiopia.

You can see and download a full-size version (10 meters/pixel) of this image and other images of the Erta Ale Volcano here:
https://flic.kr/s/aHskNdgg6P

The area on Google maps:
https://goo.gl/2ETkJd

Technical Data

For those interested, here the technical data for this image. The image is a MSI Band 12-11-8 (NIR/SWIR) image. Warmer areas are showing up in red-yellow, contrast is slightly enhanced. Image scale is 10 meters/pixel.

More Images of Earth from Space:

You can find more images of Earth from Space in my latest collection post here (https://goo.gl/1wusNm). Even more images can be found on my Flickr here (https://www.flickr.com/photos/pierre_markuse/).

More on the Copernicus programme aimed at observing the Earth:
http://www.esa.int/Our_Activities/Observing_the_Earth/Copernicus
https://en.wikipedia.org/wiki/Copernicus_Programme

More on the Sentinel-2A satellite:
https://earth.esa.int/web/guest/missions/esa-future-missions/sentinel-2
https://en.wikipedia.org/wiki/Sentinel-2

Image credit: Erta Ale Volcano, Ethiopia Contains modified Copernicus Sentinel data [2017], processed by +Pierre Markuse

Thank you for your interest in this Space/Space technology collection. Maybe add me on Google+ (+Pierre Markuse) and Twitter (https://twitter.com/Pierre_Markuse) or have a look at the Astronomy/Astrophysics collection here: https://goo.gl/x0zPAJ

#science #earth #ertaale #volcano #ethiopia #ertaalevolcano #infrared #space #sentinel #sentinel2 #esa #satelliteimages #spacetechnology #photography
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Farewell to Mimas

In this mosaic image, made from ten images taken by the Cassini spacecraft narrow-angle camera on January 30th, 2017, in visible light, you can see Saturn's tiny moon Mimas during Cassini's final close approach, which brought the spacecraft to a distance of 25,620 miles (41,230 kilometers) from Mimas. All future observations of the moon will now be from a greater distance.

The particular view was acquired at a distance of approximately 28,000 miles (45,000 kilometers) from Mimas. Image scale is 820 feet (250 meters) per pixel.

More information here:
http://photojournal.jpl.nasa.gov/catalog/PIA17213

Mimas

Mimas has a diameter of 396 kilometers (246 miles) and is orbiting Saturn every 0.9 Earth days at a distance of 185,539 kilometers (115,289 miles). It was discovered September 17th, 1789 by William Herschel (https://goo.gl/E9YsKH). More information here:
https://en.wikipedia.org/wiki/Mimas_(moon)

More on Saturn's moons:
https://en.wikipedia.org/wiki/Moons_of_Saturn

More on Saturn's ring system:
https://en.wikipedia.org/wiki/Rings_of_Saturn

More on the Cassini spacecraft:
https://www.nasa.gov/mission_pages/cassini/main/index.html
https://en.wikipedia.org/wiki/Cassini%E2%80%93Huygens

Image credit: PIA17213: Farewell to Mimas NASA/JPL-Caltech/Space Science Institute https://goo.gl/KLUCE9

Thank you for your interest in this Space/Space technology collection. Maybe add me on Google+ (+Pierre Markuse) and Twitter (https://twitter.com/Pierre_Markuse) or have a look at the Astronomy/Astrophysics collection here: https://goo.gl/x0zPAJ

#science #cassini #saturn #space #spaceexploration #solarsystem #spacetechnology #saturnringsystem #mimas
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Earth from Space: Sermilik Fjord, with Helheim, Fenris, and, Midgard Glacier, Greenland

In this composite image you can see parts of the Sermilik Fjord (Egede og Rothes Fjord) with the Helheim, Fenris, and, Midgard Glacier, Greenland, imaged by the Multi-Spectral Instrument (MSI) aboard the Sentinel-2A satellite. The images were taken August 29th, 2016.

The Sermilik Fjord (https://goo.gl/8zfcep) is a large fjord in eastern Greenland, located at the southern end of King Christian IX Land (https://goo.gl/ntIsRF). Its waters are fed by the Helheim Glacier (https://goo.gl/1wrw24), Fenris Glacier and Midgard Glacier (https://goo.gl/5oFHOM), among others, the glaciers you can see in this image. Like many others those glaciers have retreated and thinned in the last decades.

Read more on the retreat of the Helheim Glacier here:
https://earthobservatory.nasa.gov/IOTD/view.php?id=6207

Make sure to take a look at the full-size versions!

You can see and download a full-size version (10 meters/pixel) of this image and a NIR/SWIR version here:
https://flic.kr/p/SySTus (Natural colors)
https://flic.kr/p/SySnAu (NIR/SWIR view)

The area on Google maps:
https://goo.gl/GBK1q2

Technical Data

For those interested, here the technical data for this image. The image is a MSI Band 4-3-2 (natural color) image. The resulting colors are near natural, contrast is slightly enhanced. Image scale is 54 meters/pixel.

More Images of Earth from Space:

You can find more images of Earth from Space in my latest collection post here (https://goo.gl/1wusNm). Even more images can be found on my Flickr here (https://www.flickr.com/photos/pierre_markuse/).

More on the Copernicus programme aimed at observing the Earth:
http://www.esa.int/Our_Activities/Observing_the_Earth/Copernicus
https://en.wikipedia.org/wiki/Copernicus_Programme

More on the Sentinel-2A satellite:
https://earth.esa.int/web/guest/missions/esa-future-missions/sentinel-2
https://en.wikipedia.org/wiki/Sentinel-2

Image credit: Sermilik Fjord, Greenland Contains modified Copernicus Sentinel data [2017], processed by +Pierre Markuse

Thank you for your interest in this Space/Space technology collection. Maybe add me on Google+ (+Pierre Markuse) and Twitter (https://twitter.com/Pierre_Markuse) or have a look at the Astronomy/Astrophysics collection here: https://goo.gl/x0zPAJ

#science #earth #greenland #sermilikfjord #glacier #helheimglacier #fenrisglacier #space #sentinel #sentinel2 #esa #satelliteimages #spacetechnology #photography
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NGC 1448 - Spiral Galaxy

In this image, taken by the Hubble Space Telescope, you can see NGC 1448. It is an unbarred spiral galaxy, located in the constellation of Horologium (The Pendulum clock, https://goo.gl/j5428y), about 38 million light-years away from Earth.

Because we see NGC 1448 almost edge-on, its spiral structure of this galaxy is not immediately apparent to us.

The galaxy has a supermassive black hole (https://goo.gl/eQNC6O) located at its center, but the view of this black hole is obstructed by thick layers of gas and dust, so from our line of sight the active nucleus (https://goo.gl/JE6PK7) can't be seen, unless we look at its emission of high-energy X-rays with telescope like NuSTAR.

Being an unbarred spiral galaxy (https://goo.gl/n0z2vE) it lacks the central bar-shaped structure composed of stars, about one third of spiral galaxies are unbarred. A more famous example of an unbarred spiral galaxy is the Sombrero Galaxy (M104, https://goo.gl/TZmi5m).

NGC 1448 was discovered on October 24th, 1835, by the English astronomer John Herschel (https://goo.gl/WCo123).

More information here:
https://www.spacetelescope.org/images/potw1711a/
https://en.wikipedia.org/wiki/NGC_1448

More on the morphological classification of galaxies:
https://en.wikipedia.org/wiki/Galaxy_morphological_classification

Image credit: NGC1448 ESA/Hubble & NASA https://goo.gl/EJc5Sg CC BY 4.0 https://goo.gl/hNRHCd

Thank you for your interest in this Astronomy/Astrophysics collection. Maybe add me on Google+ (+Pierre Markuse) and Twitter (https://twitter.com/Pierre_Markuse) or have a look at the Space/Space Technology collection here: https://goo.gl/5KP0wx

#science #astronomy #ngc1448 #galaxy #spiralgalaxy #hubble #hst #space #unbarredspiralgalaxy #activenucleus #supermassiveblackhole
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