What surface feature of the sun emits most of its light?
Which layer of the sun produces the sun’s magnetic field?
How can solar flares affect communications on Earth?
Solar flares have been known to affect electronic communication because their energy stirs up the Earth’s upper atmosphere, making radio broadcasts noisy and weak. The flares, caused by violent storms on the Sun, eject a stream of electrically-charged particles, some of which reach the Earth.
What causes the surface of the sun to be active?
It has electrically charged gases that generate areas of powerful magnetic forces. These areas are called magnetic fields. The Sun’s gases are constantly moving, which tangles, stretches and twists the magnetic fields. This motion creates a lot of activity on the Sun’s surface, called solar activity.
How long can you go without sunspots?
The Sun Has Been Spotless for 28 Days Straight Despite New Solar Cycle. The sun has been spotless for 28 days straight, with a total of 184 days of 2020 now sunspot-free.
Why has the Sun been so big lately?
How much has the size of the Sun changed in the last few billion years? Because the Sun continues to ‘burn’ hydrogen into helium in its core, the core slowly collapses and heats up, causing the outer layers of the Sun to grow larger. This has been going on since soon after the Sun was formed 4.5 billion years ago.
How far south did the Ice Age reach?
At its maximum extent it spread as far south as latitude 37° N and covered an area of more than square km (5,000,000 square miles). In some areas its thickness reached 2,400–3,000 m (8,feet) or more.
What was Earth like before the ice age?
A true Hothouse Earth emerged when carbon dioxide levels reached something like 800ppm – about double those of today. This was the world of the dinosaurs, 100m years ago. There was little or no ice on Earth and the polar regions had forests and dinosaurs which were adapted to living half the year in darkness.