Archives » Astronomy

Fly Past of Ceres

Images of dwarf planet Ceres, taken from NASA’s Dawn spacecraft and made into a movie. (Via Astronomy Picture of the Day, 10/6/15.)

Pinhole Eclipses

I tried to photograph the pinhole camera image I managed to get of yesterday’s eclipse. It was difficult to focus the digital camera on the image made by the pinhole, though. In real life it appeared much sharper.

I did get multiple images by using a colander:-

I’ll stick to the day job.

Stargazing Live Hunting Supernovae

I’ve been watching BBC 2’s Stargazing Live the past two nights.

Not that it’s told me much I didn’t know but the hunt for supernovae they mentoned at the zooniverse site was intriguing. Apparently humans are required to check the comparison photos of patches of sky after the before and after subtraction has been made; computers can’t do it.

Up to when I looked just now over 26,000 people have taken part in the effort and over 1,000,000 comparisons have been checked. Out of these tonight’s programme said they’d found one supernova already.

There has been a lot about tomorrow’s solar eclipse in the two programmes so far. In the morning I’ll be out with my two pieces of card pinhole camera trying to image it. As I recall the percentage coverage for the last solar eclipse I witnessed (in 1999) was less than the 95 or so for my area tomorrow. I doubt I’ll see another.

An Asteroid with a Moon!

Apparently on Monday an asteroid passed very close to the Earth-Moon system, just over three times the Earth-Moon distance away. NASA’s Deep Space Network antenna array tracked it by radar.

There’s a video of this on the JPL site. The moon is clearly visible. Astounding stuff.

I found this via Astronomy Picture of the Day.

Titan’s Lakes

A movie showing liquid on the surface of a world other than Earth?

Yes indeed. This is Saturn’s moon Titan and its methane/ethane lakes in a digital compilation of still radar images from NASA’s Cassinni satellite. The liquid is deep blue, the higher land tan coloured.

The video featured on Astronomy Picture of the Day on 24/11/14.

The Heart of the Comet*

Okay, so the harpoons didn’t fire and the lander bounced twice, but to set down on a comet is a stunning achievement.

Philae on 67P/Churyumov-Gerasimenko

(Pinched from the Daily Galaxy, picture from ESA/Rosetta/Philae)

*Not quite; but I couldn’t resist.

Triton from Voyager 2

This is via Astronomy Picture of the Day, 26//8/14.

Neptune’s largest moon Triton.

The movie has been stitched together from still pictures taken by Voyager 2 on its fly past.

The Voyager missions must have been Nasa’s most successful unmanned investigations of the Solar System.

Apparently the green colour of the moon is real.

Off to a Comet

Below is a video of the approach by the Rosetta spacecraft to comet Churyumov-Gerasimenko as posted on Astronomy Picture of the Day, 11/8/14.

The ambition of this mission is simply mind-boggling.

What weird things comets are though. Not quite what Jules Verne imagined I think.

A Dangerous Neighbourhood

Below is a video of a solar coronal mass ejection on 9/5/14 as observed by NASA’s IRIS satellite.

The eruption occurs at 1.5 million miles per hour. You don’t want to get in the way of that.

Rings around an Asteroid

I haven’t done an astronomy post for ages.

This one intrigued me. An asteroid with a ring system? Yes it would seem.

The animation and occultation measurements below appeared on Astronomy Picture of the Day on 9/4/14.

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