Onizuka Center for International Astronomy

Onizuka Center for International Astronomy, Big Island

The Onizuka Center for International Astronomy is, simply put, a stargazer's dream. Located along the slopes of Mauna Kea at 9,200 feet (2,800 m) above sea level, you're much closer to the stars here, and the amazing night sky views provide spectacular proof. If you're coming from the bright lights of a big city, this place will remind you why our ancestors were so fascinated with the skies.

The Center was named after Big Island resident Ellison Onizuka, who was one of the astronauts in the Challenger, the space shuttle that broke apart in 1986 right after take-off, resulting in the death of all seven crew members.

From Saddle Road, the Center is located about 6 miles (9.7 km) up the road. Inside the Center you'll find informational displays about the mountain's geology and history, handouts, photos and computer-driven astronomy programs with links to the observatories on top of Mauna Kea. You can also watch a video about the Mauna Kea observatories.

One of the best things to do here is to take part in their popular stargazing program, which takes place from 6-10 pm daily (admission is free). The stargazing here is excellent because the sky at Mauna Kea is among the clearest, darkest and driest in the world.

Since this is the only place on Mauna Kea where you get a chance to peek through a telescope yourself, it's definitely worth it to come here in the evening (there are no public telescopes at the summit). During the day, there is a solar telescope that visitors can peek through to observe the sun and sunspots. The telescope is equipped with protective filters. In the evening, telescopes for star-viewing are available.

Due to the hazards of altitude sickness, children under 16 should not venture above the Onizuka Visitor Information Center.

Open daily from 9 am to 10 pm, 365 days a year


Onizuka Center for International Astronomy Overview

  • Interesting place to visit and acclimatize before venturing further up to the summit (a stay of one hour here is recommended)
  • Free stargazing tours are offered and a summit tour every Saturday and Sunday from 1 pm to 5 pm (weather permitting)
  • For the summit tour, you must provide your own 4 wheel drive transportation (or join a guided tour group)
  • Drinking water, coffee, and other snacks are available
  • Restrooms, bookstore and gift shop located on the premises
  • At night, they offer a popular stargazing program
  • Located about one hour from Hilo and Waimea and about two hours from Kailua-Kona
  • Bring warm clothing (long pants and a jacket). Temperatures can dip below freezing, especially during the winter.
  • Make sure you have enough gas in your vehicle. There is no gas station on Mauna Kea. The nearest station is in Hilo or Waimea.

Mauna Kea Access Rd, HI 96737
Directions: From Hilo, take the Puainako Extension (Hwy 2000), which merges with Saddle Road (Hwy 200). Just before mile marker 28, there is a road to the right and a street sign that says Mauna Kea Access Road. Turn right. The station is about 6 miles (9.7 km) up the road on the right side of the road. The drive takes about 1 hour.

From the Kona side of the island, take Highway 190 heading north toward Waimea. Just before mile marker 6, there is a turnoff on the right for Saddle Road (Hwy 200). Take Saddle Road until just after mile marker 28. Then make a left turn onto the Mauna Kea Access Road. The station is about 6 miles (9.7 km) up the road on the right side of the road. From Waimea, the drive takes about 1 hour, from Waikoloa, it takes about 1 1/2 hours, and from Kona, it takes about 2 hours.

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