Category: moon

Earth’s rotation is slowing slightly with time

Earth’s rotation is slowing slightly with time:

“In the year 1820, a rotation took exactly 24 hours, or 86,400
standard seconds. Since 1820, the mean solar day has increased by about
2.5 milliseconds.”

“At the time of the dinosaurs, Earth completed one rotation in
about 23 hours,” says MacMillan, who is a member of the VLBI team at
NASA Goddard.

* How can the moon slow down the earth ?

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Is the moon on Conan ‘O’ Brian show accurate ?

Haha.. I really appreciate the fact that you were curious about the moon’s photograph that is featured on a late night talk show. 

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Conan the talk show premiered on November 8, 2010. But it was a waxing crescent on November 8,2010 at 11:00 pm, Los Angeles CA.

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And if one were to be really nitpicky about this,by 6:30pm on November 8, 2010 the moon would have already set and you most certainly would not see the moon on the night sky at 11pm.

Therefore, not really sure what the moon is trying to represent here.

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Also the moon keeps changing its orientation over the course of one day. And if you decided to look at the moon each day at the same time , it would be look slightly different.

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                              Moon over the course of 24 hours

But the moon on Conan’s show is mostly Static.

Unless he decides to replace the already ridiculously big moon (Diameter: 3,475 km) that only is supposed to occupy ~0.00106% of the celestial hemisphere in the night sky by a Death Star (Diameter: 100 km to 160km ) of the same size!

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So.. I guess that answers your question.. Have a good one!

34 years ago, on this day NASA Astronauts performed the first…

34 years ago, on this day NASA Astronauts performed the first untethered spacewalk. And yesterday Spacex just put a Tesla Roadster in an orbit to Mars. This is truly an exciting time to be alive.

** Just to be really clear, this is not the first time we are launching “automobiles” to space.

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                                        Lunar Roving Vehicle

I would appreciate if you showed us how the moon changes in one day.. Thanks man.. Love your blog

Here you go:

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                                           Made with Stellarium

fuckyeahphysica: A change in perspective I was reviewing…

fuckyeahphysica:

A change in perspective

I was reviewing Eclipse photos from across the globe and they for some reason did not look the same. Turns out this was the reason!

And this applies to constellations* as well. The constellations when viewed from the southern hemisphere would be flipped in orientation.

Absolutely Mind Blown!

Image Source: guanolad on reddit


* not all constellations

[UPDATE]

Here’s the moon on Jan 31,2018  viewed from two different locations: One taken by one of my friends in India and other is from Northern California.

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                                  38.5449° N, 121.7405° W  (California)

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                                    12.9716° N, 77.5946° E  (India)

The best way to wrap your head around this idea is to play with it on Stellarium (open source).

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                                                     Source                                                           

Have fun!

A change in perspective I was reviewing Eclipse photos from…

A change in perspective

I was reviewing Eclipse photos from across the globe and they for some reason did not look the same. Turns out this was the reason!

And this applies to constellations as well. The constellations when viewed from the southern hemisphere would be flipped in orientation.

Absolutely Mind Blown!

Image Source: guanolad on reddit

Super Blue Blood moon, Jan 31, 2018Captured with a Canon…

Super Blue Blood moon, Jan 31, 2018

Captured with a Canon Powershot in Northern California

– FYPhysics!

How Rare Is The All-In-One Supermoon, Blue Moo…

How Rare Is The All-In-One Supermoon, Blue Moon, And Lunar Eclipse, Really?

“With all that, we can combine this information to arrive at how frequently we expect all of these to occur together:

  • Blue Moons make up about 3% of all full Moons,
  • Supermoons are approximately 25% of all full Moons, and
  • Total lunar eclipses occur during 5.6% of full Moons,

meaning that a Blue, Super, totally eclipsed Moon occurs with 0.042% of full Moons: once every 2,380 full Moons or so. On average, that corresponds to once every 265 years!”

On January 31st, 2018, an event that hasn’t occurred in the United States since 1866 will come to pass: a supermoon that’s also a blue moon, that’s also a total lunar eclipse. Sounds exciting, and incredibly rare! But if we look worldwide, we find that there was another such event just in 1982. This is puzzling when you consider that these events should only occur on timescales of centuries! Is this only a coincidence that we’re having so many “super blue blood moons” right now? Or is there a different explanation? You don’t know until you actually look at the science behind it, and that’s exactly what we’re doing here.

How rare is a supermoon, blue moon, and lunar eclipse together? Find out, and learn the best opportunities to see it!

Earth holds an elite status in the solar system

It can be casual to forget the magnificence of our planet and get lost in our tight-knit everyday lives. In the advent of a lunar eclipse (January 31, 2018)  it is worth knowing that when it comes to eclipses, Earth holds a pristine status in our solar system. 

To understand why, we need to shift our perspective a little bit and ask -”How would it be like if you were on Io (one of the moons of Jupiter)?”

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The most startling thing about this experience would be that the Jupiter would appear 36 times larger than the full moon (from earth).  That’s HUGE!

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Also since the moons of Jupiter lies in the same plane, you would be witnessing an eclipse every 42 hours …

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               Moons – Io, Ganymede, and Callisto in solar eclipse

In addition, since Jupiter has many moons (A large family of them), you might be able to catch some your fellow moons in eclipse with the sun. Their shadows though, appearing like tiny dots on the gas giant.

Saturn and its eclipse

If we make a slight detour and end up in Saturn, this is what it looks like when Saturn occults the Sun. Although not technically an eclipse, this image was captured by Cassini with Sun behind the planet, setting the rings and its atmosphere aglow.

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                     Credit:  NASA/JPL/Space Science Institute.

When people are not overwhelmed by the beauty of its rings, they notice the shadows cast by its many moons. Here is the solar eclipse of Saturn’s moon Titan:

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Eclipse on our friendly neighbor – Mars

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Larger of Mars’s two moons, Phobos passing in front of the sun – Solar eclipse.

Let’s forget about all those planets that are far away, if one were make a visit to Mars which is  ~12 light minutes away, one would witness only partial eclipses because the moons of Mars are too small to block the entire sun.

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Eclipses on Earth

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                        One Earth, One moon, A spectacular eclipse

Eclipses on earth, on the other hand, are too surreal to be true. Our planet not only supports life but also is placed in a prime location that would cause a total solar eclipse.

And as though the entire universe wanted to amuse us even more, the moon’s orbital plane is slightly misaligned from the Earth’s orbital plane around the sun which makes an occurrence of an eclipse predictable but yet not long enough; leaving us in a state of desperation wanting for more.

#LifeOnEarth