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An artist's impression of the Earth and Sun alignment during equinox

Understanding the Equinoxes

Jesse Rogerson, PhD

Canada Aviation and Space Museum

If you’re in the Northern Hemisphere, it’s the beginning of Spring, and if you’re in the Southern Hemisphere it’s the beginning of autumn. Either way, Science Advisor Jesse Rogerson explains why we have equinoxes in the first place.

Blue swirls of phytoplankton in the Black Sea, imaged from space.

Swirling Phytoplankton in the Black Sea

Jesse Rogerson, PhD

Canada Aviation and Space Museum

Around this time of year, the Black Sea blooms with a massive growth of phytoplankton. This particular species of phytoplankton known as coccolithophores, are plated with white calcium carbonate, making the bloom very easy to see from space. NASA's Aqua satellite gathered these data.

A false colour image of the Atchafalaya Delta taken by NASA's Landsat 8 satellite.

Earth & Environment

Research has Shown Ponds Along the Mississippi are Growing in Size due to Wind Erosion

Jesse Rogerson, PhD

Canada Aviation and Space Museum

A study published in the April 2017 issue of Geophysical Research Letters has shown that ponds are, on average, growing in size, and that growth is caused by the prevailing winds. This was shown by the study of over 10,000 satellite images taken between 1982 to 2016. A study like this will help conservation and environmental workers develop plans for maintaining vulnerable ponds.

A heat map of the American south west, including California, Arizona, Nevada, New Mexico, Utah, and Colorado. The map indicates where the temperature at a given location is above or below historical average.

Earth & Environment

The June Heat-Wave of the American South West

Jesse Rogerson, PhD

Canada Aviation and Space Museum

In June 2017, the American south west experienced some of the hottest temperatures felt in a long time. It was hot enough to ground air planes, and even caused some deaths. NASA's Aqua satellite measured the temperature on the surface of the Earth during the heat wave, and here is some of the results.

A map of Canada which shows the locations of all forest fires and logging between 1985 to 2010.

Earth & Environment

A complete map of forest disruption in Canada 1985-2011

Jesse Rogerson, PhD

Canada Aviation and Space Museum

Researchers from the Canadian Forest Service have created a time-series map of where and how forests have been disrupted between the years of 1985 and 2011. This is specifically tracking logging/harvesting and forest fires. A staggering 10 percent of our country's total forests saw some kind of damage over the almost 30 years. This type of research is helpful in tracking the Earth's carbon cycle, which is critical to understanding our changing climate.

A bee harvesting pollen from a purple flower.

Earth & Environment

Science Says Neonicotinoid-Based Pesticides are Bad for Bees

Jesse Rogerson, PhD

Canada Aviation and Space Museum

A large study performed by scientists from England, Hungary, and Germany has concluded that, while individual results may vary, the en masse use of of pesticides containing neonicotinoids leads to weaker Bee colonies.

The Sun is Nearing its Periodic Solar Minimum

Jesse Rogerson, PhD

Canada Aviation and Space Museum

Based on counts of sun spots on the surface of the Sun, it looks like our star is heading towards a solar minimum. This happens every 11 years or so, and is related to how the internal and external magnetic fields in the Sun interact with each other. Keeping track of this activity is important, because it can help us predict geomagnetic storms on Earth.

Satellite image of the snowpack in the Sierra mountains

Earth & Environment

The Snowpack in the Californian Mountains Quadruples

Jesse Rogerson, PhD

Canada Aviation and Space Museum

Data from NASA's Airborne Snow Observatory shows that the snowpack in the Tuolumne Basin of the Sierra Nevada mountains is 1.5 cubic kilometers, which is more than the previous 4 years combined. Californians are surely enjoying the extra precipitation, as they have been in a drought for the last 5 years. The Airborne Snow Observatory uses a combination of LIDAR and Imaging Spectrometer fixed to a small plane to measure the snowpack in the mountains of California.

An image of Saturn taken above the north pole, including the rings.

A Look Back Towards Home...

Jesse Rogerson, PhD

Canada Aviation and Space Museum

On the 12th of April 2017, the Cassini spacecraft orbiting Saturn took a minute to look back towards its home planet and snap a picture. At the time, the Earth, Moon, and all 7.125 billion humans were about 1.8 billion kilometers away. The fortuitous image catches Earth sitting between the A and F rings of Saturn, with the Keeler and Encke gaps visible as well. Cassini hasn't taken many pics of home, but this is probably my favourite so far. On 22 April 2017, Cassini will take a gravity assist

A satellite view of the Strait of Gibraltar

Phytoplankton in the Strait of Gibraltar

Jesse Rogerson, PhD

Canada Aviation and Space Museum

Two NASA Satellites were used to create this image of the straight of Gibraltar: Suomi NPP, and Aqua. The images were processed and combined to highlight the blooms of phytoplankton in the area, which has been caught up in the turbulent ocean currents moving through the strait.

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