Today’s Astronomy Picture of the Day is an incredible long-exposure picture of star trails above Mauna Kea:
I think the picture says it all.
Today’s Astronomy Picture of the Day is an incredible long-exposure picture of star trails above Mauna Kea:
I think the picture says it all.
Here’s our first view of the island of Hawai‘i, as our plane approached on Sunday morning, April 3. Snow-capped Mauna Kea is rising out of the clouds, with Mauna Loa behind it.

A week later, we spent Sunday evening waiting for our flight out of Kona Airport. (After a disastrous experience at LAX in which we arrived 2 hours ahead and got to the gate with maybe 15 minutes to spare, we showed up early for the flight home. But Kona’s much smaller and better organized, so it took us maybe 15 minutes to check in. There wasn’t even a line to go through security!)

I hope you’ve enjoyed this series on our Hawaiian vacation. I’m sorry it took so long to finish it, but hey, I managed (just barely) to beat the 6-month marker!
There was one morning in Hawai‘i that the clouds in Kona cleared and we could actually see something of Hualalai, the volcano that makes up the western side of the island and on whose slopes we were staying. Here’s the view from our hotel room balcony.

Usually it looked more like this:

Note: Our stay in Kona was April 4-10, 2005
Flashback to April and Hawaii. On the day we drove to Kilauea we stopped at various places along the way. And since it’s a nearly-100-mile drive from Kailua, there was a lot to see.
We never made it down to South Point (the southernmost tip of the island), partly because of time and partly because—believe it or not—our car rental contract forbid us to drive on the 12-mile road out to the point! Supposedly it’s poorly maintained—or it used to be, and the policy hasn’t kept up—and they don’t want the wear and tear on cars that aren’t designed for it. As I recall, rental trucks and SUVs don’t have the restriction. This was the closest we ever came to it, and you can only barely see it way off in the distance.

If you look at the end of the spray near the visible point, then go straight up toward the horizon, you’ll notice that the sky-sea line dips downward slightly and there’s a faint darker patch of sky. As far as we could tell, that’s the promontory heading out toward South Point. Even then, we weren’t quite sure. Continue reading
On the same day as our whale-watching cruise (April 6), we took a submarine tour of Kailua Bay from Atlantis Adventures. The tour started at the Kailua pier, where a boat ferried us out to the submarine in the middle of the bay. The sub itself went down to around 80-90 feet by the end of the trip, and we got to see all kinds of fish and coral.

It didn’t look nearly so blue to us, of course, since our eyes were adjusted to it. Continue reading
One of the first tours we signed up for on Hawaii was a whale watching tour. We figured even if we didn’t see any whales, we’d still have spent a couple of hours on a sailboat. It was April, near the end of the season, and we booked a tour through Red Sail (via Travelocity) on their catamaran, the Noa Noa:

Kilauea is often called the world’s most active volcano. It’s been erupting continuously since 1983 at vents several miles away from the caldera. The eruptions are still inside Hawai‘i Volcanoes National Park, but the lava hasn’t stuck to the boundaries as it flows to the sea.
So late on an April afternoon, we started driving down Chain of Craters Road toward the ocean, hoping to see (from a safe distance) lava pouring into the ocean. The road is named because it connects a series of craters left behind by old vents. At first we stopped at all of them. They ranged from large craters like Keanakako‘i to fifty-foot-deep holes filled with rubble a dozen feet from the road. Soon we realized that would take way too much time, and stuck with the ones that looked particularly interesting.
I don’t recall which crater this one was at (probably either Puhimau or Pauahi), but there was a trail up to a wooden viewing platform. I stopped at one point along the trail and took this picture of a small tree on the edge of the crater.

Let’s see, when we left off, we had nearly completed a circuit around the Kilauea caldera. Before driving down Chain of Craters road to the coast, we stopped at the Thurston Lava Tube.

Lava tubes are formed when smooth a’a lava flows through a channel, then crusts over. The still-molten lava underneath keeps flowing until the source stops, and it drains out, leaving a long tubelike cave.
We were lucky in that there were very few other tourists there at the time. (It was the first week of April, which isn’t exactly the height of Hawaii’s tourist season.) The Thurston tube is famous partly because of its size, and partly because it’s very easy to get to. It’s less than a quarter-mile walk from the road.
Years ago, I put the Niven/Pournelle novel Footfall in my to-read box. I finally started reading it today. After a prologue that takes place mostly at the press conference for the 1980 Voyager 1 encounter with Saturn, the first chapter opens (years later) with a drive up Hawaii’s Kona coast and inland to the observatories at Mauna Kea.
Now there’s timing. If I’d read it when I first picked it up, I could only imagine that sequence. Now I know exactly what it looks like. Well, aside from the fact that there are twice as many observatories now as there were when the book was written.
Picking up the oft-delayed vacation photos series, here’s the first half of our trip out to Hawai‘i Volcanoes National Park and the volcano Kilauea.
Kilauea is often referred to as the most active volcano in the world. To give you an idea why, its latest eruption started in 1983… and is still going!
We got to the park fairly late in the day, partly because we underestimated the amount of time it would take to drive there from Kailua, and partly because we stopped at various points of interest along the way. It was mid-afternoon by the time we got to the visitor’s center, where Katie stood transfixed by the lava videos and I checked out the maps.
We stopped for a late lunch at Volcano House, an old hotel built on the edge of the Kilauea Caldera. Check out the view! (The image links to a slightly larger copy.)
The crater Halema‘uma‘u, which contained a boiling lava lake from 1823–1924, is visible near the center. The southern slope of Mauna Loa rises in the background. The whole caldera is roughly elliptical in shape, and Volcano House is one end of the longer axis. I don’t remember exactly how far it is from one side to the other, but judging by the map I’d say it’s about 2×3 miles.
Off to the right, behind a tree in the panorama, are the steaming bluffs. Groundwater gets heated by the magma below the volcano and seeps out through cracks all over the caldera.
Continue reading