Near-Earth asteroids like Bennu pose a potential danger to our planet, so it's important to predict their orbits with great accuracy. Unfortunately, a phenomenon called the Yarkovsky effect can make these predictions difficult over long time periods. How does this effect work?
A movie of the Aug 21, 2017 lunar transit as viewed by the Solar Dynamics Observatory (SDO.) Credit: NASA/SDO The Sun appears in visible light, and 171 ångstrom extreme ultraviolet light. The movie shows the Sun moving a bit because
For the first time since 1979, the contiguous United States will be treated to a total solar eclipse. Even more exciting, the path of totality across the USA starts in Oregon and ends in South Carolina.
Happy June Solstice 2017! The beginning of summer for the northern hemisphere and winter for the southern hemisphere. Oh, and it is two months until the August 21, 2017 total solar eclipse! The June Solstice comes on June 21, 2017
A ‘Ring of Fire’ for parts of South America and Africa An annular solar eclipse will grace parts of South America and Southern Africa starting on the morning of Sunday, February 26, 2017. The event begins at 12:10 UTC as
For 2016, we get the special treat of a full moon on the June Solstice. This last happened in 1967 and will not happen again until 2062. The June solstice for 2016 begins on June 20th at 22:34 UT (6:34 pm EDT.)
The planet Mercury will move in front of the sun, May 9, 2016, starting around 7:15 a.m. EDT and ending around 2:45 p.m. EDT. It can be seen from the ground with special solar viewing equipment however, the best way to
Don’t blink or you’ll miss the shortest lunar eclipse of the century! What is happening? During the early morning hours of April 4, the full moon will pass through Earth’s dark or inner shadow (umbra) creating a total lunar eclipse. Portions
On March 20, 2015 a supermoon total solar eclipse occurs in the Faroe Islands and Svalbard (Norway), and a partial solar eclipse in Europe, northern and eastern Asia and northern and western Africa. The eclipse starts at 07:41 UT and ends
On Oct. 23, 2014 a partial solar eclipse will be visible to most of North America in the late afternoon. This is the last eclipse of 2014. Never look at the sun or an eclipse directly! Eye safety during solar eclipses
The Fall 2014 Eclipse SDO Eclipse Season starts today. Around 7:30 UT (2:30 EDT) each day for the next 3 weeks (until Sept. 21), Earth will pass between the Solar Dynamics Observatory (SDO) and the sun. The first eclipse is only
Today’s full moon is the year’s closest supermoon. Today’s full moon is the year’s closest supermoon. A supermoon is when a full moon or a new moon is coincident with the closest approach (called perigee) of the Moon to Earth.
What is happening? During the nighttime hours of April 14 or 15 (depending on your time zone), the full moon will pass through Earth’s dark or inner shadow (umbra) creating a total lunar eclipse for most of North and South
It’s that time of year. SDO spring eclipse season started February 27, 2014. During the 3 week season, Earth will pass between SDO and the Sun around 07:30 UT each day. Initially the eclipses are a few minutes long. Their
A CME from February 16, 2014 has impacted Earth. The CME’s magnetic structure was such that it stirred things up in the magnetosphere. A significant interplanetary shock detected by ACE at L1 at 3:10 UT, February 19, 2014. The
UPDATES 16:17 UT (11:17 UT) – The transit ends with a bang! – an M6.6 flare peaked at 16:11 from AR11967. These images are from just before the flare peak at around 16:00 UT (11:00 EST) again in all 9 SDO/AIA wavelengths.
Current Status of Comet ISON Updated Nov. 27, 2013 – 10:40 am EST or 15:40 UT Size 1.3 mi in diameter or 2 in diameter km Date and Time of Perihelion 28 November 2013, 18:38 UT (1:38 EST) Distance from
There will be a hybrid solar eclipse on Sunday November 3, 2013. This rare occurrence of an annular and total eclipse is the final eclipse event of 2013. Never look at the sun or an eclipse directly! Eye safety during solar
“One of the brightest Sungrazers we’ve seen in a long time …”, tweeted Karl Battams (@SungrazerComets) of NRL’s Sungrazing Comets Project. Battams estimates the comet to be approximately 30-50 kilometers wide and expects it to reach speeds of at least 500
The first solar eclipse of 2013 is Australia’s 2nd in 6 months Queensland Australia gets another celestial treat after enjoying a total solar eclipse in November 2012. On Friday morning, May 10 (local time Australia), the Moon will travel in
Learn about this new result in a video by NASA Goddard Heliophysics Division. NASA presented these results at a press conference today. Tomorrow I will be on a Google Hangout with several of my colleagues at NASA Goddard. http://bit.ly/YzL5Mz Ask
A total eclipse of the Sun will be visible on November 13/14, 2012 in a narrow path across the southern hemisphere. The Moon’s umbral shadow starts in northern Australia following a path across the South Pacific Ocean without crossing
Sungrazing comet seen for the first time with the SOHO/SWAN instrument. It is aptly named Comet SWAN. Ukrainian Amateur astronomer, citizen scientist, and SOHO Comet Hunter Vladimir Bezugly reported a bright blob on images taken by the SWAN instrument on
UPDATE: Lovejoy survived despite most predictions to the contrary! Check out the videos below. A sungrazing comet called Lovejoy is near what will surely be its end. Sungrazers melted by the Sun is not really new. In fact, SOHO has become
If you have looked at data from the SOHO LASCO C3 coronagraph over the last week or so you may have noticed the very bright object in the field-of-view. You might even think it looks like a UFO. You are not alone.
On December 26, SOHO discovered its 2,000th comet. Drawing on help from citizen scientists around the world, SOHO has become the single greatest comet finder of all time. This is all the more impressive since SOHO was not specifically designed to find
As expected SDO experienced another lunar transit on November 6, 2010. This time the moon crossed the southern hemisphere moving from the south pole towards the northeast (left side) edge of the sun. The transit took about 30 minutes and