APOD: 2022 April 21 – Apollo 16 Moon Panorama

Discover the cosmos!
Each day a different image or photograph of our fascinating universe is
featured, along with a brief explanation written by a professional astronomer.

2022 April 21


See Explanation.  Clicking on the picture will download
the highest resolution version available.

Explanation:

Fifty years ago, April 20, 1972,
Apollo 16’s
lunar module Orion touched
down on the Moon’s near side in the south-central Descartes Highlands.

While astronaut
Ken Mattingly
orbited overhead in Casper the
friendly command and service module
the Orion brought
John Young and Charles Duke
to the lunar surface.

The pair would spend nearly
three days on the Moon.

Constructed from images
(AS16-117-18814 to AS16-117-18820)
taken near the end of their third and final surface excursion
this panoramic view puts the lunar module in the
distance toward the left.

Their
electric lunar roving
vehicle in the foreground, Duke is operating the
camera while Young aims the high gain communications antenna skyward,
toward planet Earth.

APOD: 2022 April 22 – Planet Earth at Twilight


APOD: 2022 April 22 – Planet Earth at Twilight<br />









Discover the cosmos!
Each day a different image or photograph of our fascinating universe is
featured, along with a brief explanation written by a professional astronomer.

2022 April 22


See Explanation.  Clicking on the picture will download
the highest resolution version available.


Planet Earth at Twilight
Image Credit:

ISS Expedition 2 Crew,
Gateway to Astronaut Photography of Earth,
NASA

Explanation:

No sudden, sharp boundary marks the passage of day into night in
this gorgeous view
of ocean and clouds over
our fair planet Earth.

Instead, the shadow line or terminator is diffuse and shows
the gradual transition to darkness we experience as twilight.

With the Sun illuminating the scene from the right,
the cloud tops reflect gently reddened
sunlight filtered
through the dusty troposphere,
the lowest layer of the planet’s nurturing atmosphere.

A clear high altitude layer,
visible along the dayside’s upper edge,
scatters blue
sunlight and fades into the blackness of space.

This picture was taken in June of 2001 from the International
Space Station orbiting at an altitude of 211 nautical miles.

Of course from home,
you can check out the Earth Now.

Celebrate:
Today is Earth Day
Tomorrow’s picture: Messier 104


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Authors & editors:
Robert Nemiroff
(MTU) &
Jerry Bonnell (UMCP)
NASA Official: Phillip Newman
Specific rights apply.
NASA Web
Privacy Policy and Important Notices

A service of:
ASD at
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GSFC

& Michigan Tech. U.


APOD: 2022 April 26 – Planet Parade over Sydney Opera House



APOD: 2022 April 26 – Planet Parade over Sydney Opera House<br />









Discover the cosmos!
Each day a different image or photograph of our fascinating universe is
featured, along with a brief explanation written by a professional astronomer.

2022 April 26


The featured image shows four planets lined up behind the
Sydney Opera House in Australia. The image was taken five
days ago just before sunrise. 
Please see the explanation for more detailed information.


Planet Parade over Sydney Opera House
Image Credit & Copyright:
Prasun Agrawal

Explanation:
The world is waking up to a picturesque planet parade.

Just before dawn, the eastern skies over much of
planet Earth
are decorated by a notable line of familiar planets.

In much of Earth’s northern hemisphere, this
line of planets appears most
nearly horizontal,
but in much of
Earth’s southern hemisphere, the line appears more nearly vertical.

Pictured over the
Sydney Opera House in southern
Australia,
the planet line was captured nearly vertical about five days ago.

From top to bottom, the morning planets are
Saturn,
Mars,
Venus, and
Jupiter.

As April ends, the angular distance between Venus and Jupiter will gradually pass below a degree as they switch places.

Then, as May ends,
Jupiter will pass near Mars as those two planets
switch places.

In June, the parade will briefly expand to include Mercury.


Notable Submissions to APOD:
Morning Planet Parade 2022
Tomorrow’s picture: Jupiter eclipse


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Authors & editors:
Robert Nemiroff
(MTU) &
Jerry Bonnell (UMCP)
NASA Official: Phillip Newman
Specific rights apply.
NASA Web
Privacy Policy and Important Notices

A service of:
ASD at
NASA /
GSFC

& Michigan Tech. U.


APOD: 2022 April 23 – Messier 104


APOD: 2022 April 23 – Messier 104<br />









Discover the cosmos!
Each day a different image or photograph of our fascinating universe is
featured, along with a brief explanation written by a professional astronomer.

2022 April 23


See Explanation.  Clicking on the picture will download
the highest resolution version available.


Messier 104
Image Credit:
NASA,
ESA,
Hubble Legacy Archive;

Processing & Copyright:
Ignacio Diaz Bobillo

Explanation:

A gorgeous spiral galaxy,
Messier 104 is famous
for its nearly edge-on
profile featuring a broad ring of obscuring dust lanes.

Seen in silhouette against an extensive central bulge of stars,
the swath of cosmic dust lends a
broad brimmed hat-like appearance to the galaxy suggesting
a more popular moniker, the Sombrero Galaxy.

This sharp view
of the well-known galaxy was made
from over 10 hours of
Hubble Space Telescope
image data, processed to
bring out faint details often lost in the overwhelming glare of M104’s
bright central bulge.

Also known as NGC 4594, the Sombrero galaxy can be seen
across the spectrum, and
is host to a central
supermassive black hole.

About 50,000 light-years across and 28 million light-years away,
M104 is one of the
largest galaxies at the southern edge of the
Virgo Galaxy Cluster.

Still, the spiky foreground stars in this field of view
lie well within our own Milky Way.

Tomorrow’s picture: just press the button


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Authors & editors:
Robert Nemiroff
(MTU) &
Jerry Bonnell (UMCP)
NASA Official: Phillip Newman
Specific rights apply.
NASA Web
Privacy Policy and Important Notices

A service of:
ASD at
NASA /
GSFC

& Michigan Tech. U.


APOD: 2022 April 24 – Split the Universe



APOD: 2022 April 24 – Split the Universe<br />









Discover the cosmos!
Each day a different image or photograph of our fascinating universe is
featured, along with a brief explanation written by a professional astronomer.

2022 April 24


Split the Universe
Image Credit:
NASA, Erwin Schrödinger’s cat

Explanation:
Just now, before you hit the button, two future universes are possible.

After pressing the button, though, you will live in only one.

A real-web version of the famous
Schrödinger’s cat experiment
clicking the red button in the
featured astronaut image should transform that image into
a picture of the same astronaut holding one of two cats — one living, or one dead.

The timing of your click, combined with the
wiring of your brain and the millisecond timing of your device, will all conspire together to create a
result dominated, potentially, by the
randomness of quantum mechanics.

Some believe that your personally-initiated
quantum decision
will split the universe in two, and that both the
live-cat and dead-cat universes exist in separate parts of a
larger multiverse.

Others believe that the result of your click will
collapse the two possible
universes
into one — in a way that could not have been predicted beforehand.

Yet others believe that
the universe is classically
deterministic, so that by pressing the button you did not really split the universe, but just carried out an action predestined since time began.

We at
APOD believe that however
silly
you may feel clicking the red button, and regardless of the outcome,
you should have a thought-provoking day.

Or two.


Tomorrow’s picture: great carina


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Authors & editors:
Robert Nemiroff
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Jerry Bonnell (UMCP)
NASA Official: Phillip Newman
Specific rights apply.
NASA Web
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A service of:
ASD at
NASA /
GSFC

& Michigan Tech. U.

APOD: 2022 April 25 – The Great Nebula in Carina



APOD: 2022 April 25 – The Great Nebula in Carina<br />









Discover the cosmos!
Each day a different image or photograph of our fascinating universe is
featured, along with a brief explanation written by a professional astronomer.

2022 April 25


The featured image shows a central region of IC 2944, 
the Running Chicken Nebula. Visible are stars and dense 
clouds that form stars one day. 
Please see the explanation for more detailed information.


The Great Nebula in Carina
Image Credit & Copyright:
Ignacio Javier Diaz Bobillo

Explanation:
In one of the brightest parts of
Milky Way lies a nebula where some of the
oddest things occur.

NGC 3372, known as the
Great Nebula in Carina,
is home to massive stars and changing nebulas.

The Keyhole Nebula (NGC 3324),
the bright structure just below
the image
center, houses several of these massive stars.

The entire Carina Nebula, captured here, spans over 300 light years and lies about 7,500 light-years away in the
constellation of Carina.

Eta Carinae, the
most energetic star
in the nebula,
was one of the brightest stars in the sky in the 1830s, but
then faded dramatically.

While Eta Carinae itself maybe on the verge of a supernova explosion,
X-ray
images indicate that much of the
Great Nebula in Carina has been a veritable
supernova
factory
.


Tomorrow’s picture: opera of the planets


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Authors & editors:
Robert Nemiroff
(MTU) &
Jerry Bonnell (UMCP)
NASA Official: Phillip Newman
Specific rights apply.
NASA Web
Privacy Policy and Important Notices

A service of:
ASD at
NASA /
GSFC

& Michigan Tech. U.

Astronomy Picture of the Day



Astronomy Picture of the Day<br />









Discover the cosmos!
Each day a different image or photograph of our fascinating universe is
featured, along with a brief explanation written by a professional astronomer.

2022 April 26


The featured image shows four planets lined up behind the
Sydney Opera House in Australia. The image was taken five
days ago just before sunrise. 
Please see the explanation for more detailed information.


Planet Parade over Sydney Opera House
Image Credit & Copyright:
Prasun Agrawal

Explanation:
The world is waking up to a picturesque planet parade.

Just before dawn, the eastern skies over much of
planet Earth
are decorated by a notable line of familiar planets.

In much of Earth’s northern hemisphere, this
line of planets appears most
nearly horizontal,
but in much of
Earth’s southern hemisphere, the line appears more nearly vertical.

Pictured over the
Sydney Opera House in southern
Australia,
the planet line was captured nearly vertical about five days ago.

From top to bottom, the morning planets are
Saturn,
Mars,
Venus, and
Jupiter.

As April ends, the angular distance between Venus and Jupiter will gradually pass below a degree as they switch places.

Then, as May ends,
Jupiter will pass near Mars as those two planets
switch places.

In June, the parade will briefly expand to include Mercury.


Notable Submissions to APOD:
Morning Planet Parade 2022
Tomorrow’s picture: Jupiter eclipse


<
| Archive
| Submissions
| Index
| Search
| Calendar
| RSS
| Education
| About APOD
| Discuss
| >


Authors & editors:
Robert Nemiroff
(MTU) &
Jerry Bonnell (UMCP)
NASA Official: Phillip Newman
Specific rights apply.
NASA Web
Privacy Policy and Important Notices

A service of:
ASD at
NASA /
GSFC

& Michigan Tech. U.