July 2018 Lunar Eclipse from Adelaide

July 28, 2018

Apart from the “getting up at 4:15am” part, the total lunar eclipse on Saturday morning (July 28) was very enjoyable.

MidTotality

Luna 1 minute after maximum totality (f2.0, ISO 200, 1 sec). For reference, the right-most star is rho Capricorni, a double with a brightest component of magnitude 4.8.

I took a little over 200 images from our backyard starting a few minutes before totality began at 5am ACST until just after the end of totality at around 6:45am.

I also looked at the Moon through 7×50 binoculars from time to time, from which the impression of the Moon as a 3D ball of rock hanging in the sky was evident.

I had initially planned to use my 8″ telescope for imaging as well, but in the end, was happy with to take wide field shots, so left the scope inside.

All images were taken with a tripod-mounted Canon 1100D and 100mm fixed lens controlled using Canon EOS Utilities.

EclipseMontage

A montage showing Luna 5 minutes before the start of totality (f2.0, ISO 400, 1/8 sec), 1 minute after maximum totality (f2.0, ISO 200, 1 sec), and 9 minutes before the end of totality (f2.0, ISO 200, 1 sec).

Along with most images I’ve seen, these present a vividness not evident only by eye. The following images are perhaps closer to what was seen without aid of imaging equipment.

MarsMoonTotality2

Moon and Mars 20 minutes before the end of totality (f2.8, ISO 200, 1 second).

MoonLowOnHorizonJustBeforeEndOfTotality

The Moon and Mars 8 minutes after the end of totality (f2.0, ISO 100, 1/10 sec), just above our SW fence line.

The final image shows an incidental image of the International Space Station passing “near” our lemon tree when I noticed it passing above the Moon.

ISS

ISS trail (f2.0, ISO 100, 1.3 sec)

At least one image of the eclipsed Moon also ended up with a “stray” satellite in the field.

Two Archbishops and a Law

July 10, 2018

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Source: ABC News

Soon after the inadequate sentencing of Archbishop Wilson to 12 months of home detention (and even this he will appeal!), his successor, the Acting Archbishop of Adelaide Greg O’Kelly says that the new laws coming into effect in October requiring priests to report admissions of child sexual abuse heard during confession won’t affect the church.

Politicians can change the law, but we can’t change the nature of the confessional, which is a sacred encounter between a penitent and someone seeking forgiveness and a priest representing Christ.

That does not change by the law of politicians.

Wow.

The same old we’re in the world but not of the world mantra.

South Australian Catholics must be doing a collective facepalm at the moment. Or at least they should be.

As this ABC News article comments:

Under the Catholic Church, to gain absolution — and therefore to then be able to take holy communion again and avoid eternal damnation — a person needs to be contrite about their sins and do penance.

In the 21st century, that should give anyone pause and is a good example of why people need to be respected but beliefs don’t.

Strictly speaking, I think the foregoing only applies to so-called mortal sins. But then again, since homosexuality is counted as a mortal sin, there’s a whole segment of society that is apparently damned by nothing other than their natural state of being.

Then there’s abortion. Obviously women shouldn’t have control over their own bodies and severely deformed babies should always be brought into the world just because the Catholic church says so.

Duh.

Then there’s apostasy. That’s right. We hear about apostates having their lives threatened in some Muslim majority rule countries. But in Catholicism, it’s apparently also a grave matter to give up one’s the Christian faith. I suppose that’s not surprising since not being a Catholic means, well, not being a Catholic. Which is apparently bad…

In any case, that many of us still give such ideas the time of day is a solid indication of our lack of maturity as a species.

Religious groups demand tolerance and freedom while at the same time themselves being forces for intolerance and placing restrictions on freedom.

And yet, as Paul Collins, a former Catholic priest said in a recent ABC interview:

What’s happened within Catholicism really over the last 40 years has been a complete collapse of people going anywhere near a confessional.

Most Catholics including myself haven’t been near a confessional for 30 years or even longer.

A casual conversation with a friend who has Catholic relatives of various ages suggests this may not be an unreasonable statement.

Apparently, modern Catholic Mass allows a person to admit their sinful nature and gain absolution by the priest, asking God to have mercy on them and to forgive their sins.

So, if this is the case, wouldn’t it be nice if O’Kelly just said, yes, we’ll go along with it, especially in light of dwindling confessor numbers, instead of insulting the rest of us by ignoring the law of the land, especially since as O’Kelly himself says, priests have mandatory reporting training and responsibilities anyway?

Here’s how silly it gets, in O’Kelly’s own words:

Anything said inside the confessional box is subject to the seal of confession, but if a child mentioned he or she had been abused while there “it’s the sort of the thing where you’d invite them to speak to you outside of confession”.

In other words, what is said inside the magic box, stays inside the magic box, but if a mortal sin is spoken about outside the magic box, then the priest can report it?

We’re meant to take this seriously?

Maybe it’s best to just allow senior Catholic clerics to continue to talk themselves into the total irrelevance to which they and their Church should be relegated.

On the incoherence of the Good and Bad Place

April 9, 2018

The Good Place uses comedy to explore the absurdities of the afterlife. More than that, the show does a great job of making moral philosophy accessible.

The show’s plot assumes salvation by works, i.e. that to get to Heaven, you have to be a good person. Christian denominations differ over whether salvation by works or salvation by faith (atonement through the sacrifice of Jesus) or some combination is required to get you to Heaven or, if you’re a Jehovah’s Witness, resurrected at some future time.

An early church founder, Tertullian, looked forward to being in Heaven so he could witness the eternal torture of the wicked in Hell.

Takes all kinds I guess…

While listening to an episode of The Thinking Atheist podcast, I heard a short, simple argument, or perhaps a parable – to borrow a biblical word – that casts doubt upon the coherence of Heaven and Hell. I’ll paraphrase and extend it here.

Ruth’s daughter, Mary, believes in salvation by faith and the reality of Heaven and Hell. She’s not certain what Hell is, but she knows it means eternal separation from God.

Mary is sad that Ruth, who Mary believes isn’t saved, won’t be with her in Heaven, that she will be separated from her mother for all eternity.

And yet…

When Mary is in Heaven, blissfully worshipping God forever, won’t she feel sad about being eternally separated from Ruth?

If so, won’t that negatively affect the quality of Mary’s eternal stay in Heaven?

No problem, you say!

God can make Mary feel better. God can do anything! He is omnipotent after all. He can make her forget about how she feels. He can make her forget about Ruth, about what she meant to Mary.

Or perhaps that’s a step too far…

Maybe God won’t remove the memory, just change the way Mary thinks and feels about her history with Ruth.

But then…

Who will Mary become?

Like someone who takes a drug to forget…

Or like a person with memory loss or personality change…

Either way, surely, Ruth would become someone other than who she used to be in some important sense.

Is this a water-tight argument against the existence of the Good and Bad places? Of course not. The non-existence of a thing is generally difficult to demonstrate. But it does chip away at the coherence of such ideas and should serve to further diminish their insane hold over us.

Why do I care about this argument? Because I know people in a Mary-Ruth scenario, and because this is just another example of how religion poisons everything, as the sub-title of Christopher Hitchens’ book God is NOT Great, says.

Aren’t there enough interesting and complex phenomena to devote our attention to without inventing complexities? Without creating gods, principalities, eternal abodes or false dichotomies (heaven or hell, saved or damned, …)?

If the Universe itself was capable of having a perspective, our lives would resemble a one-shot pulse from a 555 timer, a non-repeating SETI Wow! signal, a single QRS complex on an ECG from a dying heart, each briefly punctuating a baseline of nothingness.

oneshotadjusted

And yet…

Up close and personal, it’s different, because we are meaning creators.

It’s what you do within that brief pulse that matters, to you, your fellow meaning creators, and the other beings impacted by your actions.

The plain truth is that we have a good understanding of what happens to living things when they die, homo sapiens or any other species, admittedly less so about the subjective experience of the hypoxic sapiens mind near death.

Every organism that has ever lived, or ever will, was not alive for 13.8 billion years, after the beginning of the Universe.

When the life of an organism comes to an end, it will once again not be alive for an even unimaginably longer time into the future.

What makes these two not alive events asymmetric is that mammals like us have memories of individuals who once were and an anticipation of the end, the falling edge of the pulse, the precipice.

It’s in the nature of mammals like us to remember, to worry, to grieve, to fail spectacularly to live our lives primarily in the present.

It’s from this that our musings about possible afterlives derive, for any version of which, no compelling evidence exists.

All of which underscores the importance, even the urgency, of living as if today actually mattered, not for some imagined future, and of the need to be kinder to earthlings of all persuasions and species.

 

Nova Carina 2018 update #2

March 27, 2018

Shortly after my last post I observed the nova again. Within 24 hours it has dropped by a full magnitude after peaking at 5.7, a little higher than my binocular estimate of 5.8 from last night.

My two observations are in purple, as usual, with the observation an hour ago under the cross-hairs.

ASASSN-18fv-2018-03-27

 

Nova Carina 2018 update

March 27, 2018

A “happy snap” (with iPhone) of the sky over my backyard rooftop, with Luna peeping through cloud. The nova’s location is behind me from this vantage point.

After being away for a week and a cloudy sky on Sunday, I caught my first glimpse of Nova Carinae 2018 (ASASSN-18fv) in 7×50 binoculars minutes before the sky started clouding out.

I estimated it to be 5.8 (purple, at top right) at just after 11pm Adelaide time.

Note also the upward trend-line.

I had hoped to subsequently image the nova to carry out DSLR photometry for better accuracy but that didn’t pan out due to cloud.

At the time of submission to AAVSO the last observation before mine was 6.5, several hours earlier. Since then, others have submitted observations up to 5.9. So, I appear to have caught Nova Car 2018 on the rise and at its peak so far.

Nova in Carina

March 23, 2018

Nova Car 2018 or ASASSN-18fv was discovered by the ASAS Supernova network on March 21st and has so far reached around magnitude 6.5 from a progenitor magnitude of 19.9 within a couple of days.

Below is a Stellarium view of the location of ASASSN-18fv, very close to the 5.1 magnitude comparison star near the Eta Carina nebula and star, a variable whose brightness I often estimate.

A binocular finder chart with a slightly different orientation from the Stellarium screenshot is shown below:

This is a crowded area of the sky, and being so close to the 5.1 star, it may be tricky in a low power binocular field.

Rob Kaufman posted this image of the nova, with yet another different orientation:

asassn-18fv2c202120mar20201820text2030-sec

I have not yet had the opportunity to observe the nova; hopefully in a couple of days.

The AAVSO alert notice has more details.

Nova Cir 2018 Gamma-ray Space Telescope observations

February 3, 2018

AAVSO alert notice 613 for the nova in Circinus requests visual, DSLR, CCD and spectroscopic observations, with multiple observations each night if possible, in support of the Fermi Gamma-ray Space Telescope’s observations that are currently underway:

 

spacecraft

Source: https://fermi.gsfc.nasa.gov/inc/img/spacecraft.jpg

Target-of-opportunity observations requested by Dr. Mukai are taking place now through February 6 UT with the NASA Fermi Gamma-ray Space Telescope. To support these observations, observers are asked to make several observations per night.

I’m processing DSLR observations of the nova from last night and plan to continue observing over the next few nights. Its visual magnitude is currently at around 7.2.

Here’s a spectrum taken by Rob Kaufman on January 31:

ncir201820spectrum2c203120jan2020182c2012-5420ut20text

Total Lunar Eclipse from Adelaide

February 1, 2018

Adelaide was largely clouded out for the eclipse but the cloud thinned at times well enough to get some reasonable images, especially after midnight. Taking more than 100 images also helped.

I used a Canon 1100D at the prime focus of my 8″ Schmidt-Cassegrain Alt-Az (Meade LX-90) telescope.

Here are some images I thought were interesting enough to show. These are straight off the camera with no processing except RAW to JPEG conversion.

IMG_0013-low

Pre-totality umbral shadow through cloud. ISO 100, 1/10 second.

IMG_0064-low

Totality. ISO 800, 2 seconds.

IMG_0006-low

Not long before end of totality. ISO 800, 2 seconds.

IMG_0027-low

Soon after end of totality. ISO 800, 1 second.

 

What counts as good belief?

January 29, 2018

We watched Yes, Virginia, there is a Santa Claus over the Christmas break. I’d never seen much of it and Karen’s interest in watching it again after a long hiatus encouraged me to sit down and watch it with her. Thanks Karen, it was well worth watching.

exhibits_online_yesvirginia_g14922

source: goo.gl/Xi5CDj

The true story and the TV adaptation we saw are both positive, moving tales. Eight year old Virginia’s friends tell her there is no Santa Claus so she writes a letter to the editor of The New York Sun asking for advice, since as her father tells her: “if you see it in the The Sun, it’s so”.

exhibits_online_yesvirginia_g4031

source: goo.gl/Xi5CDj

The author of the editorial: Francis Church, an atheist and cynic, having seen his share of suffering, writes an enduring letter that has inspired many since the editorial was first published in 1897. Here’s an excerpt (italics are mine):

Yes, Virginia, there is a Santa Claus. He exists as certainly as love and generosity and devotion exist, and you know that they abound and give to your life its highest beauty and joy. Alas! how dreary would be the world if there were no Santa Claus. It would be as dreary as if there were no Virginias. There would be no childlike faith then, no poetry, no romance to make tolerable this existence.

There is something beautiful in encouraging kids to imagine.

I admit to some internal conflict when our kids were young regarding what to tell them about Santa, the Easter bunny, the Tooth Fairy and so on. In the end we encouraged such beliefs for as long as the kids were willing to imagine playfully with us.

Interestingly, Virginia’s 1930 PhD thesis was entitled The Importance of Play.

Although as an atheist I generally prefer not to pretend to know things I don’t know, the kind of belief in Santa that was the subject of Virginia O’Hanlon’s letter and the The Sun editorial, is, I think, perfectly okay.

Even in recent times I’ve heard the same sort of “there is no Santa” comment that prompted Virginia’s letter to The Sun, expressed between young children, encouraged by adults, who at the same time profess belief in God.

That brings me to the question in this post’s title: what counts as good belief?

What’s the difference between these two statements?

  • I believe in Santa Claus
  • I believe in God

Other than that the first refers to a particular individual while the second to any one of a number of possible gods, their form is identical. We can remedy this remaining difference by reframing the second statement as:

  • I believe in Jesus (or Yaweh or Jeohvah or …)

Too often, the second form is accompanied by exclusive statements, such as:

Hmm…and here I was thinking that the reason for the season was axial tilt. Not to mention Saturnalia.

1503931_333096903500225_1694979872_n

sourcegoo.gl/1nFcUZ

The worst that can happen, in the child’s mind, for not believing in Santa or for being on the naughty list, is that they will receive no presents. True, there have been other harsher myths associated with Christmas, but I’m thinking broadly about the contemporary situation in the western world.

The worst that can happen, in the believer’s mind, for non-belief in God or being wicked (i.e. not accepting either salvation by faith or works) is eternal separation from God and loved ones or eternal torment in Hell.

So, again, what counts as good belief?

In my view, it’s the kind that doesn’t hold you ransom, that encourages you to imagine things not yet imagined while not making threats or requiring you to be dogmatic or to abandon critical thinking. In short, one that allows you to be creative but still allows you to think for yourself.

Take the risk of thinking for yourself. Much more happiness, truth, beauty, and wisdom will come to you that way. Christopher Hitchens

A key difference between encouraging a child to believe in a powerful being who can deliver presents to every house in a single night and childhood indoctrination into belief in a personal god, and the associated demands, is the exclusivity of the second. That and the lack of fun.

Here’s another excerpt (again, my italics):

Virginia, your little friends are wrong. They have been affected by the skepticism of a skeptical age. They do not believe except they see. They think that nothing can be which is not comprehensible by their little minds. All minds, Virginia, whether they be men’s or children’s, are little. In this great universe of ours man is a mere insect, an ant, in his intellect, as compared with the boundless world about him, as measured by the intelligence capable of grasping the whole of truth and knowledge.

I have some sympathy with Church’s view that:

They have been affected by the skepticism of a skeptical age. They do not believe except they see.

and especially:

In this great universe of ours man is a mere insect, an ant, in his intellect, as compared with the boundless world about him.

We have to be careful not to throw the baby out with the bathwater of course. As George Santayana says:

Scepticism is the chastity of the intellect, and it is shameful to surrender it too soon or to the first comer: there is nobility in preserving it coolly and proudly through long youth, until at last, in the ripeness of instinct and discretion, it can be safely exchanged for fidelity and happiness.

There is so much we don’t yet understand and we should approach the gulf between what we do and don’t know with humility. The universe as revealed through evidence by Science so far is stranger than anything we could have imagined:

  • We live in a universe in which everything we can see and touch makes up only a few percent of everything that is, the rest apparently being dark matter or dark energy.
  • On the smallest scales there exists a seething ocean of particle-antiparticle pairs coming into and out of existence.
  • If we travel fast enough, time will slow down and our mass will increase.

Alice’s world seems almost normal by comparison.

Science doesn’t claim to have the answer to all questions, yet the Scientific Method is the most successful and powerful form of knowledge acquisition we know. If new evidence comes to light to change our model of the world, then it will change after the dust has settled. That’s an important departure from dogmatic thinking, and skepticism is an important part of the Scientific Method.

There’s room for a child-like view of the world that encourages imagination and optimism, as well as an honest view of the world that requires careful thought and evidence regarding important questions, especially those with life-changing potential.

Kids will ask questions about early beliefs when they’re ready and that’s okay. Adults should encourage the fun aspects of early belief with a twinkle in their eye while accepting that questions will come.

It’s often been said that children are natural born scientists until society discourages them from asking honest, simple questions. I’d like to think that Francis Church the cynic and Virginia the child seeker-of-answers and adult teacher might have agreed.

In all affairs it’s a healthy thing now and then to hang a question mark on the things you have long taken for granted. Bertrand Russell

Nova Cir 2018

January 28, 2018

In my last post on January 20 about Nova Mus 2018, I said that another southern nova had been discovered, this one by John Seach in the early hours of January 19 in the constellation of Circinus, near alpha and beta Centauri. That post also showed a Stellarium context screenshot and pointed to an AAVSO finder chart.

This nova has slowly been on the rise for the last several days from around magnitude 8.5 to 6.3 by January 27.

The following 15 second DSLR images I took on Jan 22, 23, 26 and 27 show the nova brightening over time:

NovaCir2018Panels

If the images seem out of focus, that’s because they are. They were used for photometry rather than with the intention of being pretty; use of defocus is part of the procedure. See this talk I gave about DSLR photometry in 2015 for more detail. There’s some positional differences between frames, reflecting the difference in observation time from night to night.

The light curve below shows visual, Johnson V, and Tri-Color Green (DSLR) observations from January 19 to 28; mine are in purple. I’ve also submitted observations in blue and red bands.

NovaCir2018LCJan28

This light curve doesn’t appear to show a simple linear increase, so it will be interesting to see where the rise stops.

Rob Kaufman (discoverer of Nova Mus 2018) said that a low resolution spectrum he took on January 26 was essentially featureless.

The sky is largely clouded out tonight here in Adelaide at the end of a hot day (42° C), but I just caught a quick glimpse of the nova in 7×50 binoculars, but wasn’t able to check against comparison stars. It’s around the same magnitude as last night though. I’ll carry out more DSLR photometry as soon as I can.

In the meantime I have two more nights of Nova Mus 2018 (currently on the decline) DSLR images to process. I’ll write an update post for that nova too.