Posted on 11/05/2018 8:13:00 AM PST by ETL
ESO 338-4, also known as LEDA 63240 and IRAS 19245-4140, is classified as a blue compact dwarf galaxy.
It resides in the constellation Corona Australis, some 100 million light-years from Earth.
Blue compact dwarf galaxies take their name from the intensely blue star-forming regions that are often found within their cores.
One such region can be seen embedded in ESO 338-4, which is populated with bright young stars voraciously consuming hydrogen.
These massive stars are doomed to a short existence, as despite their vast supplies of hydrogen fuel.
The nuclear reactions in the cores of these stars will burn through these supplies in only millions of years.
The young blue stars nestled within a cloud of dust and gas in the center of this image are the result of a recent galaxy merger between a wandering galaxy and ESO 388-4.
This galactic interaction disrupted the clouds of gas and dust surrounding the galaxy and led to the rapid formation of a new population of stars.
The color image of ESO 338-4 was made from separate exposures taken in the visible, ultraviolet and infrared regions of the spectrum with Hubbles Advanced Camera for Surveys (ACS), Wide Field Camera 3 (WFC3) and Space Telescope Imaging Spectrograph (STIS).
Five filters were used to sample various wavelengths.
The color results from assigning different hues to each monochromatic image associated with an individual filter.
(Excerpt) Read more at sci-news.com ...
Gasp!
It’s a “sized challenged” galaxy, not a dwarf galaxy.
Oops, obviously “size” not “sized”.
The Barbera Streisand in me emerged.
Eeeeeuuuuuuuu.
Dwarf galaxy Hubble image ping!
As it looked 100 million years ago.
“The nuclear reactions in the cores of these stars will burn through these supplies in only millions of years.”
How can some stars only last a few millions of years, but many stars last many billions of years?
I'll wait....................
The candle that burns twice as bright lasts half as long.....................
How can some stars only last a few millions of years, but many stars last many billions of years?
—
Size matters.
The smaller you are the more longevity you have.
Some red dwarves will burn their fuel efficiently over TRILLIONS of years.
Blue giants gobble up their gas with maximum inefficiency and only last millions.
But that’s good. When they explode, they scatter metals.
Depends on their mass. High mass stars burn "blue hot". Our sun is a yellow, much cooler star.
Some red dwarves will burn their fuel efficiently over TRILLIONS of years.
...
Due to the almost complete burning of hydrogen due to convection.
Red dwarfs are theorized to evolve into blue dwarfs. There are no blue dwarfs yet. Not even close.
We can’t call them Midget Galaxies?........................
Not necessarily "size", but "mass". There are huge red giant stars that are among the coolest stars.
Not necessarily "size", but "mass". There are huge red giant stars that are among the coolest stars.
Depends on their mass. High mass stars burn "blue hot". Our sun is a yellow, much cooler star.
Probably should add that hotter stars burn through their fuel faster than cooler stars so the cooler stars are around alot longer than the hotter ones.
“Gasp!
Its a sized challenged galaxy, not a dwarf galaxy.”
Or a ‘Little Galaxy’ galaxy.
Some of those Galaxies had big 390 engines which were fuel suckers.
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.