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J
Johnbarrow
John from Bartow
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ASTRONOMY
Galaxies
Giant Elliptical Galaxy
Giant elliptical galaxies hide a violent merger history behind their smooth appearance
24 hours ago
0
What is the primary process believed to form giant elliptical galaxies, and how does it affect their structure?
Gradual accumulation of gas leading to spiral arm formation
Merging of smaller galaxies, which randomizes star orbits and creates a smooth ellipsoidal shape
Continuous star formation maintaining their spiral features
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PeterPan
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ASTRONOMY
Galaxies
Whirlpool Galaxy
A cosmic dance with a companion galaxy fuels the Whirlpool's dazzling spiral arms
36 hours ago
0
What key factor intensifies the spiral arms and star formation in the Whirlpool Galaxy?
Its isolation from other galaxies allowing undisturbed growth
Its gravitational interaction with the companion galaxy NGC 5195
The absence of a central black hole preventing energy emissions
S
SteveO1
Technology and cars
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Galaxies
Large Magellanic Cloud
A dwarf galaxy with a giant impact on our cosmic neighborhood
40 hours ago
0
How does the Large Magellanic Cloud influence star formation in its region?
It blocks star formation by absorbing all nearby gas and dust.
It is too small and distant to have any effect on star formation in the Local Group.
Its gravitational interaction with the Milky Way and Small Magellanic Cloud triggers bursts of star formation.
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PeterPan
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Galaxies
Triangulum Galaxy
A cosmic neighbor with a surprising role in shaping our Local Group's dynamics
3 days ago
0
What is a key reason the Triangulum Galaxy is important to astronomers studying the Local Group?
Its proximity and size allow detailed study of spiral galaxy structure and star formation.
It is the largest galaxy in the Local Group, dominating gravitational interactions.
It is a distant elliptical galaxy with little star formation activity.
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SteveO1
Technology and cars
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Galaxies
Whirlpool Galaxy
A cosmic tug-of-war sculpts the Whirlpool Galaxy’s stunning spiral arms and sparks star birth
4 days ago
0
How does the interaction between the Whirlpool Galaxy and its companion influence its structure and star formation?
The gravitational forces from the companion galaxy create tidal waves that shape the spiral arms and trigger star formation.
The companion galaxy's gravity causes the Whirlpool Galaxy to shrink and lose its spiral arms.
The Whirlpool Galaxy's spiral arms are static and unaffected by any external forces.
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PeterPan
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Galaxies
Large Magellanic Cloud
A dwarf galaxy's close orbit reveals secrets of the Milky Way's cosmic neighborhood
6 days ago
0
What is a significant consequence of the Large Magellanic Cloud being a satellite galaxy of the Milky Way?
It is the largest galaxy in the Local Group, dominating the Milky Way.
It influences star formation and galactic dynamics within the Milky Way system.
It is completely isolated and has no gravitational interaction with the Milky Way.
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Peter_Fonda
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Galaxies
Messier 110
A dwarf galaxy caught in the gravitational grip of Andromeda reveals cosmic evolution in action
7 days ago
0
How does the gravitational interaction between Messier 110 and the Andromeda Galaxy influence M110's evolution?
It causes M110 to become a spiral galaxy similar to Andromeda.
It distorts M110's shape and triggers star formation by stripping gas and stars.
It has no significant effect on M110 because dwarf galaxies are too small to be influenced.
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Peter_Fonda
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Galaxies
Andromeda Galaxy
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A colossal neighbor on a slow-motion collision course reshaping our cosmic future
11 days ago
Contrary to popular belief, the Andromeda Galaxy is not just a distant, faint smudge in the night sky but the closest major galaxy to our own Milky Way, poised on a cosmic collision course with...
B
Bonbo
Me as you
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Galaxies
Small Magellanic Cloud
The Small Magellanic Cloud is one of the most distant objects visible without a telescope, revealing the vast scale of our cosmic neighborhood.
6 Feb 2026
0
What key factor has influenced the irregular shape and star formation activity in the Small Magellanic Cloud?
Gravitational interactions with the Milky Way and the Large Magellanic Cloud
Its isolated position far from any other galaxies
Its classification as a spiral galaxy with stable star formation
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SteveO1
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Galaxies
Small Magellanic Cloud
The Small Magellanic Cloud offers a nearby glimpse into galaxy evolution and cosmic interactions
5 Feb 2026
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What is a primary reason for the irregular shape of the Small Magellanic Cloud?
Gravitational interactions with the Milky Way and the Large Magellanic Cloud
Its rapid rotation causing spiral arms to form
It is a star cluster within the Milky Way rather than a separate galaxy
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SteveO1
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Galaxies
NGC 1365
NGC 1365 showcases a rare double-barred spiral structure shaping star formation and galactic dynamics
4 Feb 2026
0
What role do the bars in NGC 1365 play in the galaxy's evolution?
They prevent star formation by dispersing gas away from the galaxy's center.
They are remnants of galaxy collisions and have no effect on current star formation.
They funnel gas towards the center, fueling star formation and central black hole activity.
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PeterPan
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Galaxies
Andromeda Galaxy
The Andromeda Galaxy is the nearest major galaxy to the Milky Way, visible to the naked eye
30 Jan 2026
0
What is the significance of the Andromeda Galaxy's proximity to the Milky Way in astronomical studies?
It is the only galaxy visible from Earth without a telescope.
It allows astronomers to study galaxy structure and predict future galactic collisions.
Its proximity means it is moving away from the Milky Way at high speed.
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SteveO1
Technology and cars
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Starburst Galaxy
Starburst galaxies shine brightly with intense, rapid star formation fueled by cosmic collisions
19 Jan 2026
0
What is the primary cause of the exceptionally high star formation rates observed in starburst galaxies?
The presence of supermassive black holes at their centers
Events like galaxy collisions or close encounters that compress gas and dust
A permanent increase in the galaxy's overall mass
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SteveO1
Technology and cars
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Galaxies
Starburst Galaxy
Starburst galaxies shine brilliantly with rapid star formation fueled by cosmic collisions
17 Jan 2026
0
What is the primary cause of the exceptionally high star formation rate in starburst galaxies?
A sudden increase in dark matter concentration within the galaxy
The presence of a supermassive black hole at the galaxy's center
Events like galaxy collisions or interactions that compress gas and dust
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