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#astrophotography

107 posts80 participants6 posts today
Replied to earthling
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earthling

Herbig-Haro 49/50 (Spitzer and Webb Images Side-by-Side)

This side-by-side comparison shows a Spitzer Space Telescope Infrared Array Camera image of HH 49/50 (left) versus a Webb image of the same object (right) using the NIRCam (Near-infrared Camera) instrument and MIRI (Mid-infrared Instrument).

science.nasa.gov/missions/webb

#astrophotography
#Spitzer
#JWST
#NASA

The Webb image shows intricate details of the heated gas and dust as the protostellar jet slams into the material. Webb also resolves the “fuzzy” object located at the tip of the outflow into a distant spiral galaxy. The Spitzer image shows 3.6-micron light in blue, the 4.5-micron in green, and the 8.0-micron in red (IRAC1, IRAC2, IRAC4). In the Webb image, blue represents light at 2.0-microns (F200W), cyan represents light at 3.3-microns (F335M), green is 4.4-microns (F444W), orange is 4.7-microns (F470N), and red is 7.7-microns (F770W). NASA, ESA, CSA, STScI, NASA-JPL, SSC
ALT
Public
Miss Gayle

"Earth’s atmosphere is made up of different gases, mainly nitrogen and oxygen. The color of an aurora depends on the type of gas involved and how high up the collision occurs.

Aurora displays can occur at heights between approximately 80 and 500 km (50–311 miles) above Earth’s surface.

This also affects the colors that we see in the sky."

Article: timeanddate.com/news/astronomy

TimeAndDate.com Solar Maximum & the Aurora What Solar Maximum Means for Aurora Colors in 2025 By Eloise Elliott and Renate Mauland-Hus Published 26-Mar-2025 Will increased activity from the Sun affect the colors we see in the aurora this year? Find out the science behind these incredible lights in the sky. Aurora colors appear at different altitudes—this illustration shows an approximation, as actual heights can vary greatly. "It’s important to note that these are the typical altitudes for auroras, but they are famously unpredictable! Sometimes the ionized nitrogen molecules can travel up, and when sunlight hits them, they can create a blue color which can appear pink or purple if mixed with red emissions. This phenomenon is referred to as sunlit auroras. There have been some cases of blue auroras observed at heights of around 1000 km (621 miles), as well as red auroras at approximately 600 km (373 miles). This is likely the reason why many official sources on the aurora differ slightly when it comes to the altitudes where the different colors of the aurora are produced."
ALT
#Aurora#Astronomy#AstroPhotography
Public
grobi

Messier 81
* Image Credit & Copyright: Lorand Fenyes
fenyeslorand.hu/en/

Explanation:
One of the brightest galaxies in planet Earth's sky is similar in size to our Milky Way Galaxy: big, beautiful Messier 81. Also known as NGC 3031 or Bode's galaxy for its 18th century discoverer, this grand spiral can be found toward the northern constellation of Ursa Major, the Great Bear. The sharp, detailed telescopic view reveals M81's bright yellow nucleus, blue spiral arms, pinkish starforming regions, and sweeping cosmic dust lanes. But some dust lanes actually run through the galactic disk (left of center), contrary to other prominent spiral features. The errant dust lanes may be the lingering result of a close encounter between M81 and the nearby galaxy M82 lurking outside of this frame. Scrutiny of variable stars in M81 has yielded a well-determined distance for an external galaxy -- 11.8 million light-years.
fenyeslorand.hu/m81/
science.nasa.gov/mission/hubbl
spitzer.caltech.edu/image/ssc2
apod.nasa.gov/apod/ap200515.ht
apod.nasa.gov/apod/ap010112.ht
burro.astr.cwru.edu/Academics/
ui.adsabs.harvard.edu/abs/1994

spaceplace.nasa.gov/galaxy/en/

apod.nasa.gov/apod/ap250327.ht

2025 March 27 Messier 81 * Image Credit & Copyright: Lorand Fenyes Explanation: One of the brightest galaxies in planet Earth's sky is similar in size to our Milky Way Galaxy: big, beautiful Messier 81. Also known as NGC 3031 or Bode's galaxy for its 18th century discoverer, this grand spiral can be found toward the northern constellation of Ursa Major, the Great Bear. The sharp, detailed telescopic view reveals M81's bright yellow nucleus, blue spiral arms, pinkish starforming regions, and sweeping cosmic dust lanes. But some dust lanes actually run through the galactic disk (left of center), contrary to other prominent spiral features. The errant dust lanes may be the lingering result of a close encounter between M81 and the nearby galaxy M82 lurking outside of this frame. Scrutiny of variable stars in M81 has yielded a well-determined distance for an external galaxy -- 11.8 million light-years. Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP) NASA Official: Amber Straughn Specific rights apply. NASA Web Privacy Policy and Important Notices A service of: ASD at NASA / GSFC, NASA Science Activation & Michigan Tech. U.
ALT
#space#galaxy#astrophotography
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