Click on image for full size
Courtesy of NASA and the University of Iowa.
Snowballs Entering The Earth's Atmosphere?
News story originally written on June 20, 1997
The Polar spacecraft has just found snowballs in space. We usually think of snowballs being in our backyard during wintertime, but these snowballs are flying into the Earth's atmosphere.
These snowballs can be as large as a small house! Can you imagine trying to throw a snowball that big? They are not dangerous to humans on Earth, because the snowballs break apart while they are still very far away from us.
These snowballs are entering the atmosphere at a rate of 5-30 snowballs per minute, or thousands of snowballs in a given day. That's more snowballs than you could make even during a long winter day!
Shop Windows to the Universe Science Store!
Our online store
on science education, ranging from evolution
, classroom research
, and the need for science and math literacy
You might also be interested in:
There are small snow comets that crash into the Earth's atmosphere. About 20 snow comets weighing 20 to 40 tons each crash into the Earth's atmosphere every minute! Scientists have seen these small comets...more
It was another exciting and frustrating year for the space science program. It seemed that every step forward led to one backwards. Either way, NASA led the way to a great century of discovery. Unfortunately,...more
The Space Shuttle Discovery lifted off from Kennedy Space Center on October 29th at 2:19 p.m. EST. The sky was clear and the weather was great. This was the America's 123rd manned space mission. A huge...more
Scientists found a satellite orbiting the asteroid, Eugenia. This is the second one ever! A special telescope allows scientists to look through Earth's atmosphere. The first satellite found was Dactyl....more
The United States wants Russia to put the service module in orbit! The module is part of the International Space Station. It was supposed to be in space over 2 years ago. Russia just sent supplies to the...more
A coronal mass ejection (CME) happened on the Sun last month. The material that was thrown out from this explosion passed the ACE spacecraft. ACE measured some exciting things as the CME material passed...more
Trees and plants are a very important part of this Earth. Trees and plants are nature's air conditioning because they help keep our Earth cool. On a summer day, walking bare-foot on the sidewalk burns,...more